which salt?

[soupdragon10]

Having recently bought some new fish, I put them into quarantine - just as well, as the clown loach have developed ich. Had to happen on Saturday night when all shops are shut.
As I have both clown loach and corys in the tank I intend to use salt as a treatment, plus raising temp as recommended in many of the forums.
My question is the only salt I have available until shops open tomorrow is cooking salt which contains sodium hexacyanoferrate as an anti caking agent. Will this harm the fish? I have read Daveedka's excellent article, and am not worried about iodine, but nowhere is the anti caking agent mentioned.
Help! does anyone know if this will have a bad effect on the fish?

fish are

3 small clown loach
1 small black ghost knife fish
2 bronze cory
4 paleatus cory
3 small angel fish

 

[daveedka]

Although I haven't tried every type of cooking slat personally, I have seen none that are warned against. In general the anti-caking agents come in such low quantities that they simply can't be of harm at the levels we are dealing with. The only anti-caking agent that I have ever seen warnings agaisnt is Prussiate of Soda (sp ???) used in some canning salt. I do know for a fact that those warnings are incorrect as well. essentially food grade salt is safe as far as I know. We have folks here who have used pretty much every type of salt sold at the grocery store, and I have even seen some reccomend rock salt. I personally would not be concerned about it at all.
HTH
Dave