What kind of epsom salt is aquarium safe?

[lamchiheng]

Yesterday I notice my platy scratching on my plants, I think is the ich. No spots on the body yet on all my fish. I just started seachem paraguard treatment. I heard about epsom salt baths may help my fish recover, just wondering which kind are aquarium safe? recommendation?

I have API aquarium salt in my tank at about 1/2 teaspoon per gallon, supposedly made from evaporated sea water. I have a 20 gallon planted tank. If I get the epsom salt how much should I use? I don't want to raise my GH...currently at 13 dGH

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Thanks

 

[Wiggles24]

If it's iCh the best treatment is to raise the temp to 88 and leave it there got at least s week after you see the last spot. But if you don't see any spots don't just assume it's iCh.