Never put table salt in an aquarium. I was sitting there watching the aquaruim one day and my koi was ribbing his side on the gravel. I asked my uncle what was wrong and he said to just put some salt in there, i did. The next few days after the fish had ich. I was freaked out from it thinking they where gonna die. All that died where 1 dwarf gourami, 1 neon blue gourami, and 2 hi-fin black tetras. Luckily the koi didnt die. One of the goldfish couldnt even swim right! It would lay on its side and float to the top so I would out the net in there to get it out then it would swim away. So yeah, never put table salt for aqarium salt in and aqauruim!