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Re: iodide in the planted tank
On Tue, 25 Jul 2000, Neil Travis wrote:
> Iodine is not added to table salt because people need it but purely to make
> it flow better as normal cooking salt which has is not iodised tends to mix
> freely with water and as such would clog up the salt shaker etc. and goes
> hard with moisture from the air as salt is hydroscopic. Iodised salt in high
> concentrations is poisonous to fish and should not be used in an aquarium
> only natural or non idodised salt is suitable.
It's my long-standing understanding that iodide *is* added to table salt
for nutritional reasons. It's for the health of your thyroid.
Not all table salt is iodized. For some reason my wife buys uniodized
table salt. I don't think that adding iodide to salt does anything to keep
it from clumping in humid conditions. They add calcium silicate and a few
other things for that purpose.
As to the toxicity of iodide... I actually add it to some of my tanks.
It seems necessary for the long-term maintenance of ghost shrimp. At the
levels I use it, I've not noticed any problem with the fish in those tanks
and certainly the plants don't complain.
Iodine, on the other hand, is toxic and quite unstable.