Well some of the fish in my 55 gallon tank have come down with a case of ich. i treated it all went well and the ich was gone. then the next day loads of white "spots" are back on the same fish. the tank is 55 gallons with 2 jacks who dont have anything, 2 blue acaras who have it, 2 convicts who do not have it, a foremouth who doesnt have it, and a bala shark who has got it really bad. i am still treating for ich, but could it be velvet that i have and am mistreating the fish for ich? most of the more dominant fish have nothing wrong with them, but the less agressice fish seem very succeptable to it. sorry i have not tested, but i know the water is good as i did a 50% water change on Saturday and raised the temp to 81 degrees. please help me. thanks a lot.