I got two fish the other day from the lfs & before I added them to my main tank (90gal) I put them in a 10gal to make sure they was alright. A 1 inch rusty & a blue unknown. Well anyways now I see little spots look like small grains of salt. I think it's ick I raised the temp & wanted to know could I add table salt or does it has to be aquarium salt?