"Trevor" wrote in message
news
On Fri, 18 Jun 2004 16:45:07 -0400, Chris Palma wrote:


Hi.

I can't help with a recommendation for the concentration that you
want,
but I think I can help with the unit conversion.

I checked, and a tablespoon = 14.8 ml. 10 US gallons is 37.85L. So
1
tbsp / 10 US gallons is roughly a 0.04% solution (just about 400
ppm). 1
tbsp per 5 gallons should be twice that, or 0.08%. So I think that
your
estimate of 0.1% solution is on the high end of the original
recommendation you read.

--chris


On Sat, 19 Jun 2004 01:11:29 -0400, NetMax wrote:

Not very precise, but easy to remember, every teaspoon per gallon is
0.1% (a US teaspoon is about 5ml).


By my own experience and calculations I found that a metic tot measure
of
25 ml capacity contained salt (fairly course) that weighed 33g. This
was
calculated by measuring 15 level tots and weighing the salt on a scale
that was accurate to 20g and divinding the weight 496 by 15 to get
33.07
which I rounded down to 33g per 25 ml of salt. I would imagine that
finer
salt would have weighed more.

So according to Netmaxs approximation rule of 5ml salt per gallon
(3.79l)
= 0.1 % or 1000ppm I calculated completed differently by the following
methodology

5ml salt = 5/25 * 33 = 6.6g of salt per gal or 3.75 litre therefore
6.6/3.79 = 1.74g per litre = 1740mg per liter or ppm = 0.17 % or 70%
more
than 0.1 % approximation.

From Chris' conversion we get the following calculation

14.8ml of salt = 14.8/25 *33 = 19.54g salt per 37.85 litres
19.54/37.85 = 0.52 g per litre = 520mg per litre or ppm = .05% = 25%
more
than chris' rough figure but close enough I would imagine!

Obviously both Chris and Netmax never gave exact conversions but
useable approximations, unless my maths is way out We can see that
teaspoon/tablespoon to measure salt is a lousy measure and it would be
nice to see people using ppm or percentage figures for salt remedies.

But in closing I guess even if for me (and my paticular salt granule
size)
either method would have given a reasonable concebtration even if they
were (according to my calcs 25 and 75 percent out at these low
concentrations particlularly for the large cichlids I have a .1% or
even
.2% solution is not going to have a harmfull effect.

I do not think I have worked my brain harder than this for a while -
but
it is fun!!

On further reading and taking a picture of my oscar which really shows
it
I amd more convinced that it is suffering from HITH. You can see a
picture
here if you would like to confirm this for me and comment on the
severity
of this case. www.geocities.com/thereaperman69

Thanks

Trev

If you can figure out a reliable conversion, please share it. I've read
that for salt calculations, because of water's changing density, the
calculation should include temperature, with the reference typically
being 59F. The few times I've tried to calculate salt dosages (with
patient help from others), we came out to approximately 1g = 1ml and a
tablespoon per g was 0.3%. While this might not be very accurate, 1
tsp/g = 0.1% helps me be consistent.

For example, Goldfish (freshwater fish) have come from saline levels of
17ppt, but they cannot withstand prolonged exposure to 15ppt (which
worked out to 11 teaspoon per gallon). That gives you quite a broad
range (zero to 11), so stability and changing levels gradually seems just
as important. I agree that larger fish are far less susceptible to
excess salt, being better able to regulate themselves. Good luck with
your Oscar.
--
www.NetMax.tk