Adding nitrates without adding Ca, Mg or K

[Philippe Lemaire \(remove oldies\)]

Is there a way ?

Philippe

[George Pontis]

Philippe Lemaire (remove oldies) wrote:

> Is there a way ?
>
> Philippe

The only other compound that is a likely candidate would be sodium
nitrate. The others are poisonous, expensive, or unavailable.

If this is for a planted tank, what's wrong with readily available
potassium nitrate ? Usually a planted tank needs more potassium than
nitrate, so you use KNO3 to supply as much nitrate as needed and add
more KCl to get the K up to target.

--

George

[Philippe Lemaire \(remove oldies\)]

George Pontis wrote:
> Philippe Lemaire (remove oldies) wrote:
>
>> Is there a way ?
>>
>> Philippe
>
> The only other compound that is a likely candidate would be sodium
> nitrate. The others are poisonous, expensive, or unavailable.
>
> If this is for a planted tank, what's wrong with readily available
> potassium nitrate ? Usually a planted tank needs more potassium than
> nitrate, so you use KNO3 to supply as much nitrate as needed and add
> more KCl to get the K up to target.

I add some KH2PO4 and my K is nearly at 60 ppm.
Perhaps, shall I reduce TMG and Profito supplies
but how be sure that traces are sufficient ?

Thanks again !

Philippe

[George Pontis]

Philippe Lemaire (remove oldies) wrote:

> George Pontis wrote:
> > Philippe Lemaire (remove oldies) wrote:
> >
> > > Is there a way ?
> > >
> > > Philippe
> >
> > The only other compound that is a likely candidate would be sodium
> > nitrate. The others are poisonous, expensive, or unavailable.
> >
> > If this is for a planted tank, what's wrong with readily available
> > potassium nitrate ? Usually a planted tank needs more potassium than
> > nitrate, so you use KNO3 to supply as much nitrate as needed and add
> > more KCl to get the K up to target.
>
> I add some KH2PO4 and my K is nearly at 60 ppm.
> Perhaps, shall I reduce TMG and Profito supplies
> but how be sure that traces are sufficient ?
>
> Thanks again !
>
> Philippe

Usually we need very little KH2PO4 (potassium phosphate), maybe enough
to get 1ppm phosphate.

The K that we get along with the phosphate is less than the K that
comes along with the nitrate in potassium nitrate. After dosing those
two we still need to add many times more K to get up to what the plants
want.

I don't know what TMG or Profito contains, but I thought TMG was only
traces. K is usually considered a nutrient and is supplied in much
larger amounts than the traces.

The simplest method that I have seen for ensuring proper amounts of
nutrients and traces is the Barr method, usually called "EI" for
Estimative Index. You can read about it if you register at
www.barrreport.com. A good tool for mixing your own potions is Chuck
Gadd's Aquarium calculator, which you can download from his interesting
pages here: http://www.csd.net/~cgadd/aqua/



--

[Philippe Lemaire \(remove oldies\)]

George Pontis wrote:
> Philippe Lemaire (remove oldies) wrote:
>
>> George Pontis wrote:
>>> Philippe Lemaire (remove oldies) wrote:
>>>
>>>> Is there a way ?
>>>>
>>>> Philippe
>>>
>>> The only other compound that is a likely candidate would be sodium
>>> nitrate. The others are poisonous, expensive, or unavailable.
>>>
>>> If this is for a planted tank, what's wrong with readily available
>>> potassium nitrate ? Usually a planted tank needs more potassium than
>>> nitrate, so you use KNO3 to supply as much nitrate as needed and add
>>> more KCl to get the K up to target.
>>
>> I add some KH2PO4 and my K is nearly at 60 ppm.
>> Perhaps, shall I reduce TMG and Profito supplies
>> but how be sure that traces are sufficient ?
>>
>> Thanks again !
>>
>> Philippe
>
> Usually we need very little KH2PO4 (potassium phosphate), maybe enough
> to get 1ppm phosphate.
>
> The K that we get along with the phosphate is less than the K that
> comes along with the nitrate in potassium nitrate. After dosing those
> two we still need to add many times more K to get up to what the plants
> want.
>
> I don't know what TMG or Profito contains, but I thought TMG was only
> traces. K is usually considered a nutrient and is supplied in much
> larger amounts than the traces.
>
> The simplest method that I have seen for ensuring proper amounts of
> nutrients and traces is the Barr method, usually called "EI" for
> Estimative Index. You can read about it if you register at
> www.barrreport.com. A good tool for mixing your own potions is Chuck
> Gadd's Aquarium calculator, which you can download from his interesting
> pages here: http://www.csd.net/~cgadd/aqua/

Thanks for the info !

Philippe

[js1]

On 2005-11-30, Philippe Lemaire (remove oldies) > wrote:
> Is there a way ?
>

Add more fish?

--
"I have to decide between two equally frightening options.
If I wanted to do that, I'd vote." --Duckman

[Philippe Lemaire \(remove oldies\)]

js1 wrote:
> On 2005-11-30, Philippe Lemaire (remove oldies) > wrote:
>> Is there a way ?
>>
>
> Add more fish?

Too many, already :-(

Philippe

[Andrzej Konarski]

U¿ytkownik "Philippe Lemaire (remove oldies)"
> napisa³ w wiadomo¶ci
...
> Is there a way ?
>
> Philippe
>
Yes

[Philippe Lemaire \(remove oldies\)]

Andrzej Konarski wrote:
> U¿ytkownik "Philippe Lemaire (remove oldies)"
> > napisa³ w wiadomo¶ci
> ...
>> Is there a way ?
>>
>> Philippe
>>
> Yes

NH4NO3 ?

Philippe who has fishes

[Andrzej Konarski]

U¿ytkownik "Philippe Lemaire (remove oldies)"
> napisa³ w wiadomo¶ci
...
> Andrzej Konarski wrote:
>> U¿ytkownik "Philippe Lemaire (remove oldies)"
>> > napisa³ w wiadomo¶ci
>> ...
>>> Is there a way ?
>>>
>>> Philippe
>>>
>> Yes
>
> NH4NO3 ?
>
> Philippe who has fishes
>
>
What for do you need nitrates ?
For the plants ?

[Philippe Lemaire \(remove oldies\)]

Andrzej Konarski wrote:
> U¿ytkownik "Philippe Lemaire (remove oldies)"
> > napisa³ w wiadomo¶ci
> ...
>> Andrzej Konarski wrote:
>>> U¿ytkownik "Philippe Lemaire (remove oldies)"
>>> > napisa³ w wiadomo¶ci
>>> ...
>>>> Is there a way ?
>>>>
>>>> Philippe
>>>>
>>> Yes
>>
>> NH4NO3 ?
>>
>> Philippe who has fishes
>>
>>
> What for do you need nitrates ?
> For the plants ?

Yes !

Philippe

[Andrzej Konarski]

Philippe Lemaire (remove oldies) wrote:
> Andrzej Konarski wrote:
>> U¿ytkownik "Philippe Lemaire (remove oldies)"
>> > napisa³ w wiadomo¶ci
>> ...
>>> Andrzej Konarski wrote:
>>>> U¿ytkownik "Philippe Lemaire (remove oldies)"
>>>> > napisa³ w wiadomo¶ci
>>>> ...
>>>>> Is there a way ?
>>>>>
>>>>> Philippe
>>>>>
>>>> Yes
>>>
>>> NH4NO3 ?
>>>
>>> Philippe who has fishes
>>>
>>>
>> What for do you need nitrates ?
>> For the plants ?
>
> Yes !
>
> Philippe

I add Kno3 to water change and I reach with this method 20 ppm of no3 and 12
ppm of K.
I want to have 200 ppm of K and the 8 ppm I reach adding Kcl(can add k2so4
but I use ro water )
I dont add more Kno3 in week because K can cumulate.
If 20 ppm to fresh water dont pass and in the end of week I have 0 ppm of
no3 I add more fish.
With this method I hold correct target of K (20ppm).
If You want add nitrates daily or in every other day add NH4NO3 but do not
measure and check no3 but Nh4.
He is more dangerous, but plants teke nh4 faster and without any loss of
energy.


--
Pozdrawiam
Konarski Andrzej
gg 6422573

" Akwarium bez ro¶lin jest niczym ogród bez kwiatów "
--

[Andrzej Konarski]

> I want to have 200 ppm of K and the 8 ppm I reach adding Kcl(can add

20 ppm K naturally :)))
Sry for mistake.

--
Pozdrawiam
Konarski Andrzej
gg 6422573

" Akwarium bez ro¶lin jest niczym ogród bez kwiatów "
--

[Philippe Lemaire \(remove oldies\)]

Andrzej Konarski wrote:
>
> I add Kno3 to water change and I reach with this method 20 ppm of no3 and 12
> ppm of K.
> I want to have 200 ppm of K and the 8 ppm I reach adding Kcl(can add k2so4
> but I use ro water )
> I dont add more Kno3 in week because K can cumulate.
> If 20 ppm to fresh water dont pass and in the end of week I have 0 ppm of
> no3 I add more fish.
> With this method I hold correct target of K (20ppm).
> If You want add nitrates daily or in every other day add NH4NO3 but do not
> measure and check no3 but Nh4.
> He is more dangerous, but plants teke nh4 faster and without any loss of
> energy.
>
>
> --
> Pozdrawiam
> Konarski Andrzej
> gg 6422573
>
> " Akwarium bez ro¶lin jest niczym ogród bez kwiatów "

I already have too many fishes and too much K (60 ppm) ;-)
And probably too many plants !

Philippe

[Andrzej Konarski]

Philippe Lemaire (remove oldies) wrote:
> Andrzej Konarski wrote:
>>
>> I add Kno3 to water change and I reach with this method 20 ppm of
>> no3 and 12 ppm of K.
>> I want to have 200 ppm of K and the 8 ppm I reach adding Kcl(can add
>> k2so4 but I use ro water )
>> I dont add more Kno3 in week because K can cumulate.
>> If 20 ppm to fresh water dont pass and in the end of week I have 0
>> ppm of no3 I add more fish.
>> With this method I hold correct target of K (20ppm).
>> If You want add nitrates daily or in every other day add NH4NO3 but
>> do not measure and check no3 but Nh4.
>> He is more dangerous, but plants teke nh4 faster and without any
>> loss of energy.
>>
>>
>> --
>> Pozdrawiam
>> Konarski Andrzej
>> gg 6422573
>>
>> " Akwarium bez ro¶lin jest niczym ogród bez kwiatów "
>
> I already have too many fishes and too much K (60 ppm) ;-)
> And probably too many plants !
>
> Philippe

And You have low no3 ?

--
Pozdrawiam
Konarski Andrzej
gg 6422573

" Akwarium bez ro¶lin jest niczym ogród bez kwiatów "
--

[Philippe Lemaire \(remove oldies\)]

Andrzej Konarski wrote:
>
> And You have low no3 ?
>
> --
> Pozdrawiam
> Konarski Andrzej
> gg 6422573
>
> " Akwarium bez ro¶lin jest niczym ogród bez kwiatów "

I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the water.

Philippe

[Andrzej Konarski]

> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
> water.
>
And what do you want ot change ?
I cannot understand You !!!
You have high no3 and do You want to add nitrates or amonium ???

[Philippe Lemaire \(remove oldies\)]

Andrzej Konarski wrote:
>> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
>> water.
>>
> And what do you want ot change ?
> I cannot understand You !!!
> You have high no3 and do You want to add nitrates or amonium ???

I have to add Ca or Mg to keep NO3 crashing to 0...
My tank consumes 40 ppm NO3 per week that I have to add...
Unfortunately Ca and Mg are added in the same time !

Philippe

[Andrzej Konarski]

U¿ytkownik "Philippe Lemaire (remove oldies)"
> napisa³ w wiadomo¶ci
...
> Andrzej Konarski wrote:
>>> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
>>> water.
>>>
>> And what do you want ot change ?
>> I cannot understand You !!!
>> You have high no3 and do You want to add nitrates or amonium ???
>
> I have to add Ca or Mg to keep NO3 crashing to 0...
> My tank consumes 40 ppm NO3 per week that I have to add...
> Unfortunately Ca and Mg are added in the same time !

If I good understand You....
It's not possible !!!
I add too mg,ca, no3 and po4 together and mg and ca dont crashing anything.

[Philippe Lemaire \(remove oldies\)]

Andrzej Konarski wrote:
> U¿ytkownik "Philippe Lemaire (remove oldies)"
> > napisa³ w wiadomo¶ci
> ...
>> Andrzej Konarski wrote:
>>>> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
>>>> water.
>>>>
>>> And what do you want ot change ?
>>> I cannot understand You !!!
>>> You have high no3 and do You want to add nitrates or amonium ???
>>
>> I have to add Ca or Mg to keep NO3 crashing to 0...
>> My tank consumes 40 ppm NO3 per week that I have to add...
>> Unfortunately Ca and Mg are added in the same time !
>
> If I good understand You....
> It's not possible !!!
> I add too mg,ca, no3 and po4 together and mg and ca dont crashing anything.

I meant NO3 is kept constant although Mg and Ca go higher and higher...

Philippe

[Charles]

On Thu, 15 Dec 2005 00:08:22 +0100, "Philippe Lemaire \(remove
oldies\)" > wrote:

>Andrzej Konarski wrote:
>> U¿ytkownik "Philippe Lemaire (remove oldies)"
>> > napisa³ w wiadomo¶ci
>> ...
>>> Andrzej Konarski wrote:
>>>>> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
>>>>> water.
>>>>>
>>>> And what do you want ot change ?
>>>> I cannot understand You !!!
>>>> You have high no3 and do You want to add nitrates or amonium ???
>>>
>>> I have to add Ca or Mg to keep NO3 crashing to 0...
>>> My tank consumes 40 ppm NO3 per week that I have to add...
>>> Unfortunately Ca and Mg are added in the same time !
>>
>> If I good understand You....
>> It's not possible !!!
>> I add too mg,ca, no3 and po4 together and mg and ca dont crashing anything.
>
>I meant NO3 is kept constant although Mg and Ca go higher and higher...
>
>Philippe
>


Seems to me then that the suggestion of ammonium nitrate would work,
if your filters can convert the ammonia quickly enough to nitrite,
then to nitrate. Other than that, highly dilute nitric acid.

[Philippe Lemaire \(remove oldies\)]

Charles wrote:
>
>
> Seems to me then that the suggestion of ammonium nitrate would work,
> if your filters can convert the ammonia quickly enough to nitrite,
> then to nitrate. Other than that, highly dilute nitric acid.

I use now Mg(NO3)2.(H20)6 and Ca(NO3)2.(H20)4 at 50g/l level.
I try to keep an Ca to Mg ratio to about 5/1.
Unfortunately, Nitric acid shall not be available in powder form :-(
I will check the availability of diluted solutions !

Philippe

[Andrzej Konarski]

--
U¿ytkownik "Philippe Lemaire (remove oldies)"
> napisa³ w wiadomo¶ci
...
> Andrzej Konarski wrote:
>> U¿ytkownik "Philippe Lemaire (remove oldies)"
>> > napisa³ w wiadomo¶ci
>> ...
>>> Andrzej Konarski wrote:
>>>>> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
>>>>> water.
>>>>>
>>>> And what do you want ot change ?
>>>> I cannot understand You !!!
>>>> You have high no3 and do You want to add nitrates or amonium ???
>>>
>>> I have to add Ca or Mg to keep NO3 crashing to 0...
>>> My tank consumes 40 ppm NO3 per week that I have to add...
>>> Unfortunately Ca and Mg are added in the same time !
>>
>> If I good understand You....
>> It's not possible !!!
>> I add too mg,ca, no3 and po4 together and mg and ca dont crashing
>> anything.
>
> I meant NO3 is kept constant although Mg and Ca go higher and higher...

Normal.
Because the plants use very fast no3.
Mg and ca not so fast

[Andrzej Konarski]

>> Seems to me then that the suggestion of ammonium nitrate would work,
>> if your filters can convert the ammonia quickly enough to nitrite,
>> then to nitrate. Other than that, highly dilute nitric acid.
>
> I use now Mg(NO3)2.(H20)6 and Ca(NO3)2.(H20)4 at 50g/l level.
> I try to keep an Ca to Mg ratio to about 5/1.
> Unfortunately, Nitric acid shall not be available in powder form :-(
> I will check the availability of diluted solutions !

GOOD !!!!
What for this gimnastic ??????
I use too only ro water.
Caco3,Kcl,Mgso4,kno3,nacl and this is all.
Simply and affectively !!!

[Richard Sexton]

>Seems to me then that the suggestion of ammonium nitrate would work,

Absolutely not. Ammonia and ammonium are deadly toxic to fish. Bad advice.

They are for terrestrial plants only, and almost any house or garden
plant fertilizer uses ammonia but you will never see it in anything
meant for aquaria.


--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

[Richard Sexton]

In article >,
Philippe Lemaire \(remove oldies\) > wrote:
>Andrzej Konarski wrote:
>>> I stay at about 25 ppm adding 40 ppm per week and changing 1/6 of the
>>> water.
>>>
>> And what do you want ot change ?
>> I cannot understand You !!!
>> You have high no3 and do You want to add nitrates or amonium ???
>
>I have to add Ca or Mg to keep NO3 crashing to 0...
>My tank consumes 40 ppm NO3 per week that I have to add...
>Unfortunately Ca and Mg are added in the same time !
>
>Philippe

Bonjour Philippe;

What you want to do is very simple. You need to find out what is in your
tapwater - how much nitrate, how much carbonsate, how much magnesium and
for other chemicals.

Then you need to establish what you want your tank to be. Again, how much
nitrate, phosphate and so on.

Now you buy some Potassium nitrate, Potassium sulphate, Magnesium sulphate,
Potassium monophosphate and an iron and trace elements mix.

Make up stock solutions of them in distilled water.

Now, knowing what your bare tapwater is, and what you want,
you can ad these chemicals one at a time from solution and attain
the levels you want.

In an established tank you would add different amounf of chemicals.

But this is complicated, and to be honest if you jsut follow Tom Barr's
"Estimative Index" regime of fertilizers, you'll have no problems
at all.

These calculators may help: http://aquaria.net/sys/tank


Best regards from Canada,


--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

[Philippe Lemaire \(remove oldies\)]

Richard Sexton wrote:

> Bonjour Philippe;

Bonjour Richard !

>
> What you want to do is very simple. You need to find out what is in your
> tapwater - how much nitrate, how much carbonsate, how much magnesium and
> for other chemicals.
>
> Then you need to establish what you want your tank to be. Again, how much
> nitrate, phosphate and so on.
>
> Now you buy some Potassium nitrate, Potassium sulphate, Magnesium sulphate,
> Potassium monophosphate and an iron and trace elements mix.
>
> Make up stock solutions of them in distilled water.
>
> Now, knowing what your bare tapwater is, and what you want,
> you can ad these chemicals one at a time from solution and attain
> the levels you want.

I follow you till there and I do it for long !
However, surely due a mistake of mine when I reached 2000 mg/l of K
in my tank, I have difficulties to bring it lower than 60 mg/l
surely due to the fact my trace mix shall contain some K too...

As I have lots of plants, I had only Magnesium nitrate and Calcium nitrate
to feed them in nitrates, raising the GH accordingly !

Now I add Nitric acid diluted at 2%...
And I change 25% of the water each week !
GH and KH slowly go down :-)
Unfortunately not K, so I will limit the trace mix

Which Fe level should be OK ?

>
> Best regards from Canada,

Best regards from Belgium

[Richard Sexton]

>> What you want to do is very simple. You need to find out what is in your
>> tapwater - how much nitrate, how much carbonsate, how much magnesium and
>> for other chemicals.
>>
>> Then you need to establish what you want your tank to be. Again, how much
>> nitrate, phosphate and so on.
>>
>> Now you buy some Potassium nitrate, Potassium sulphate, Magnesium sulphate,
>> Potassium monophosphate and an iron and trace elements mix.
>>
>> Make up stock solutions of them in distilled water.
>>
>> Now, knowing what your bare tapwater is, and what you want,
>> you can ad these chemicals one at a time from solution and attain
>> the levels you want.
>
>I follow you till there and I do it for long !
>However, surely due a mistake of mine when I reached 2000 mg/l of K
>in my tank, I have difficulties to bring it lower than 60 mg/l
>surely due to the fact my trace mix shall contain some K too...

It shouldn't. Where were you ading potassium.

If you chnage half he water once a week it'll take care of any
imbalances although you may need ot make two 80% water changes
to get rid of any current exess wastes (like too much K).

>As I have lots of plants, I had only Magnesium nitrate and Calcium nitrate
>to feed them in nitrates, raising the GH accordingly !
>
>Now I add Nitric acid diluted at 2%...
>And I change 25% of the water each week !

I'd go for 50. This limits any concentration of chemicals
you ad per week to 2X their weekly dose as an absolute
upper bound.

>GH and KH slowly go down :-)
>Unfortunately not K, so I will limit the trace mix
>
>Which Fe level should be OK ?

3ppm unchelated and 3 ppm chelated is what natural cryptocoryne
waters in Asia are (Host and Kipper). I use that and it seems to be fine.

Cheers,

--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

[Philippe Lemaire \(remove oldies\)]

Richard Sexton wrote:
>
> It shouldn't. Where were you ading potassium.
>
> If you chnage half he water once a week it'll take care of any
> imbalances although you may need ot make two 80% water changes
> to get rid of any current exess wastes (like too much K).

If you think it doesnt come from the substrate, it shall come from the
trace mix...

>
> I'd go for 50. This limits any concentration of chemicals
> you ad per week to 2X their weekly dose as an absolute
> upper bound.

Agreed ! Now, the upper bound is 4X but I don't have the composition
of my trace mix (in K and Fe at least) !

>
>> GH and KH slowly go down :-)
>> Unfortunately not K, so I will limit the trace mix
>>
>> Which Fe level should be OK ?
>
> 3ppm unchelated and 3 ppm chelated is what natural cryptocoryne
> waters in Asia are (Host and Kipper). I use that and it seems to be fine.

JBL test said 0.4, back to 0.2 since I incresed the water changes !

>
> Cheers,

Thanks again !

Philippe

[Richard Sexton]

In article >,
Philippe Lemaire \(remove oldies\) > wrote:
>Richard Sexton wrote:
>>
>> It shouldn't. Where were you ading potassium.
>>
>> If you chnage half he water once a week it'll take care of any
>> imbalances although you may need ot make two 80% water changes
>> to get rid of any current exess wastes (like too much K).
>
>If you think it doesnt come from the substrate, it shall come from the
>trace mix...

There is literally only a trace of potassium in iron/trace mix.

--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

[Philippe Lemaire \(remove oldies\)]

Richard Sexton wrote:
> In article >,
> Philippe Lemaire \(remove oldies\) > wrote:
>> Richard Sexton wrote:
>>>
>>> It shouldn't. Where were you ading potassium.
>>>
>>> If you chnage half he water once a week it'll take care of any
>>> imbalances although you may need ot make two 80% water changes
>>> to get rid of any current exess wastes (like too much K).
>>
>> If you think it doesnt come from the substrate, it shall come from the
>> trace mix...
>
> There is literally only a trace of potassium in iron/trace mix.

So lot of it was trapped in the substrate ??
Or is ProFito different ???

Philippe

[Richard Sexton]

>>> If you think it doesnt come from the substrate, it shall come from the
>>> trace mix...
>>
>> There is literally only a trace of potassium in iron/trace mix.
>
>So lot of it was trapped in the substrate ??
>Or is ProFito different ???

I assume ProFito is a substrate material? No substrate should leak
potassium intothe water anything that would is far too unstable
to be ever used in a fishtank.

Okay, now say your tank holds 40 liters. You take out all the water
that you can. About 30 liters. There's still 10L in the substrate.

So, when you add more water all the crap in solution in the water
in the substrate now comes back into the tank water, EVEN IF YOU
REPLACED ALL OF IT. Now, if you have something in yout gravel
that is leaking potassium into the water column that woiuld doit
too. Did you ever use any plant fertilizer tabs in that gravel?


--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

[Philippe Lemaire \(remove oldies\)]

Richard Sexton wrote:
>>>> If you think it doesnt come from the substrate, it shall come from the
>>>> trace mix...
>>>
>>> There is literally only a trace of potassium in iron/trace mix.
>>
>> So lot of it was trapped in the substrate ??
>> Or is ProFito different ???
>
> I assume ProFito is a substrate material? No substrate should leak
> potassium intothe water anything that would is far too unstable
> to be ever used in a fishtank.

It is a liquid fertiliser...

>
> Okay, now say your tank holds 40 liters. You take out all the water
> that you can. About 30 liters. There's still 10L in the substrate.

So after 2 years, even if the tank water was once with 2000 mg/l
of potassium, the leakage shall be ended now...

>
> So, when you add more water all the crap in solution in the water
> in the substrate now comes back into the tank water, EVEN IF YOU
> REPLACED ALL OF IT. Now, if you have something in yout gravel
> that is leaking potassium into the water column that woiuld doit
> too. Did you ever use any plant fertilizer tabs in that gravel?

I'm afraid yes :-(
I'm back at 3 per week from 10 last year...

Thanks for all !

Philippe

[Richard Sexton]

>> too. Did you ever use any plant fertilizer tabs in that gravel?
>
>I'm afraid yes :-(
>I'm back at 3 per week from 10 last year...
>
>Thanks for all !

Ah. That'll do it. You might want to remove as much of the gravel as
you can and replace it with clean gravel. A diatom filter would be
handy.

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[Philippe Lemaire \(remove oldies\)]

Richard Sexton wrote:
>>> too. Did you ever use any plant fertilizer tabs in that gravel?
>>
>> I'm afraid yes :-(
>> I'm back at 3 per week from 10 last year...
>>
>> Thanks for all !
>
> Ah. That'll do it. You might want to remove as much of the gravel as
> you can and replace it with clean gravel. A diatom filter would be
> handy.

Going this way from now !

Philippe