which Eheim to overfilter a 75g?

[Chris Palma]

Hi.

I currently use only an Aquaclear 300 HOB filter with my 75 gallon
aquarium. I've been thinking that I would like to add a canister filter
to my setup and after my latest experiences with parasites, I'm thinking
of getting a UV sterilizer at the same time.

I took a quick look at Big Al's online, and they have several options -- I
don't plan on disconnecting the Aquaclear, so this would only be adding
capacity, so I think I can start small. The Eheim 2213 is on-sale at Big
Al's for $65, which I think is a good price based on what I've heard
discussed here. They also have the Ecco Comfort by Eheim for $90 (US).
But I don't think I need to go with that large of a filter. Any opinions
specifically on these models?

Any advice appreciated...

Thanks!

-chris

[NetMax]

"Chris Palma" > wrote in message
...
> Hi.
>
> I currently use only an Aquaclear 300 HOB filter with my 75 gallon
> aquarium. I've been thinking that I would like to add a canister
filter
> to my setup and after my latest experiences with parasites, I'm
thinking
> of getting a UV sterilizer at the same time.
>
> I took a quick look at Big Al's online, and they have several
options -- I
> don't plan on disconnecting the Aquaclear, so this would only be adding
> capacity, so I think I can start small. The Eheim 2213 is on-sale at
Big
> Al's for $65, which I think is a good price based on what I've heard
> discussed here. They also have the Ecco Comfort by Eheim for $90 (US).
> But I don't think I need to go with that large of a filter. Any
opinions
> specifically on these models?
>
> Any advice appreciated...
>
> Thanks!
>
> -chris

When driving a UV, you need to check what their optimum operating flow
is, to size your pump/filter. If your flow rate is too slow, then
bacteria can continue to multiply in the tank. If your flow is too high,
then the UV will become less efficient, allowing bacteria to pass through
it. For your reference the 2213 will give you about 100gph (I'm not
familiar with the Ecco Comfort, and would be concerned about cheaper
filters). I have a 2213, and it handles back-pressure very well
(whenever my spraybar gets filled with snails), and UVs are not too
restrictive anyways. If you need more flow, the similar upsized designs
are the 2215 (135gph) and 2217 (209gph), but I recommend that you start
by checking your UV specs, and position your filter flow in the top 25%
of the range (to allow for some reduction as the canister fills with
detritus). hth
--
www.NetMax.tk

[Chris Palma]

Hi NetMax.

Great advice, as usual. I went ahead and ordered the 2213 and the UV
because the flow rate of the 2213 is at the high end for the UV I wanted.

Thanks!

--chris


On Sat, 19 Jun 2004, NetMax wrote:

> "Chris Palma" > wrote in message
> ...
> > Hi.
> >
> > I currently use only an Aquaclear 300 HOB filter with my 75 gallon
> > aquarium. I've been thinking that I would like to add a canister
> filter
> > to my setup and after my latest experiences with parasites, I'm
> thinking
> > of getting a UV sterilizer at the same time.
> >
> > I took a quick look at Big Al's online, and they have several
> options -- I
> > don't plan on disconnecting the Aquaclear, so this would only be adding
> > capacity, so I think I can start small. The Eheim 2213 is on-sale at
> Big
> > Al's for $65, which I think is a good price based on what I've heard
> > discussed here. They also have the Ecco Comfort by Eheim for $90 (US).
> > But I don't think I need to go with that large of a filter. Any
> opinions
> > specifically on these models?
> >
> > Any advice appreciated...
> >
> > Thanks!
> >
> > -chris
>
> When driving a UV, you need to check what their optimum operating flow
> is, to size your pump/filter. If your flow rate is too slow, then
> bacteria can continue to multiply in the tank. If your flow is too high,
> then the UV will become less efficient, allowing bacteria to pass through
> it. For your reference the 2213 will give you about 100gph (I'm not
> familiar with the Ecco Comfort, and would be concerned about cheaper
> filters). I have a 2213, and it handles back-pressure very well
> (whenever my spraybar gets filled with snails), and UVs are not too
> restrictive anyways. If you need more flow, the similar upsized designs
> are the 2215 (135gph) and 2217 (209gph), but I recommend that you start
> by checking your UV specs, and position your filter flow in the top 25%
> of the range (to allow for some reduction as the canister fills with
> detritus). hth
> --
> www.NetMax.tk
>
>
>

[NetMax]

Kewl :o) Next item is to determine how long the UV will be left on (I
believe it has a negative effect on plants, and it can't distinguish
between good and bad bacteria), and do a little plumbing between the
filter hoses and the UV barbs. I'm only a casual UV user, so my further
help will become very limited, but sometimes there are people here who
them regularly, and there is the NG archives and web articles on them.
--
www.NetMax.tk

"Chris Palma" > wrote in message
...
>
>
> Hi NetMax.
>
> Great advice, as usual. I went ahead and ordered the 2213 and the UV
> because the flow rate of the 2213 is at the high end for the UV I
wanted.
>
> Thanks!
>
> --chris
>
>
> On Sat, 19 Jun 2004, NetMax wrote:
>
> > "Chris Palma" > wrote in message
> >
...
> > > Hi.
> > >
> > > I currently use only an Aquaclear 300 HOB filter with my 75 gallon
> > > aquarium. I've been thinking that I would like to add a canister
> > filter
> > > to my setup and after my latest experiences with parasites, I'm
> > thinking
> > > of getting a UV sterilizer at the same time.
> > >
> > > I took a quick look at Big Al's online, and they have several
> > options -- I
> > > don't plan on disconnecting the Aquaclear, so this would only be
adding
> > > capacity, so I think I can start small. The Eheim 2213 is on-sale
at
> > Big
> > > Al's for $65, which I think is a good price based on what I've
heard
> > > discussed here. They also have the Ecco Comfort by Eheim for $90
(US).
> > > But I don't think I need to go with that large of a filter. Any
> > opinions
> > > specifically on these models?
> > >
> > > Any advice appreciated...
> > >
> > > Thanks!
> > >
> > > -chris
> >
> > When driving a UV, you need to check what their optimum operating
flow
> > is, to size your pump/filter. If your flow rate is too slow, then
> > bacteria can continue to multiply in the tank. If your flow is too
high,
> > then the UV will become less efficient, allowing bacteria to pass
through
> > it. For your reference the 2213 will give you about 100gph (I'm not
> > familiar with the Ecco Comfort, and would be concerned about cheaper
> > filters). I have a 2213, and it handles back-pressure very well
> > (whenever my spraybar gets filled with snails), and UVs are not too
> > restrictive anyways. If you need more flow, the similar upsized
designs
> > are the 2215 (135gph) and 2217 (209gph), but I recommend that you
start
> > by checking your UV specs, and position your filter flow in the top
25%
> > of the range (to allow for some reduction as the canister fills with
> > detritus). hth
> > --
> > www.NetMax.tk
> >
> >
> >
>
>

[Michi Henning]

"NetMax" > wrote in message
...
> Kewl :o) Next item is to determine how long the UV will be left on (I
> believe it has a negative effect on plants,

Not as far as I know, and not that I've noticed. (I'm running a sterilizer
24x7.)

The one effect might be that, if you add chelated iron, you'll find iron levels
drop because the UV can destroy the chelators, so the iron turns into rust
more quickly than it would otherwise. For me, that hasn't been much of
a problem. I add traces daily and, by the time the entire tank contents
have made their way through the sterilizer, I suspect that plants will already
have had their fill of iron.

BTW, if you want to work out how long you have to leave the sterilizer
on for a given tank volume, flow rate, and wattage, get hold of a copy
of Escobal, "Aquatic Systems Engineering: Devices and How They Function."
It gives all the detail you possibly could want and provides the formulae
that allow you to work it out exactly.

Cheers,

Michi.

--
Michi Henning Ph: +61 4 1118-2700
ZeroC, Inc. http://www.zeroc.com

[NetMax]

"Michi Henning" > wrote in message
...
> "NetMax" > wrote in message
> ...
> > Kewl :o) Next item is to determine how long the UV will be left on
(I
> > believe it has a negative effect on plants,
>
> Not as far as I know, and not that I've noticed. (I'm running a
sterilizer
> 24x7.)
>
> The one effect might be that, if you add chelated iron, you'll find
iron levels
> drop because the UV can destroy the chelators, so the iron turns into
rust
> more quickly than it would otherwise. For me, that hasn't been much of
> a problem. I add traces daily and, by the time the entire tank contents
> have made their way through the sterilizer, I suspect that plants will
already
> have had their fill of iron.
>
> BTW, if you want to work out how long you have to leave the sterilizer
> on for a given tank volume, flow rate, and wattage, get hold of a copy
> of Escobal, "Aquatic Systems Engineering: Devices and How They
Function."
> It gives all the detail you possibly could want and provides the
formulae
> that allow you to work it out exactly.
>
> Cheers,
>
> Michi.
>
> --
> Michi Henning Ph: +61 4 1118-2700
> ZeroC, Inc. http://www.zeroc.com
>

Thanks Michi, for an on-line basic calculation, there is:
http://www.wideopenwest.com/~brucegeist/turnover/index.html
--
www.NetMax.tk