ok heres the deal, I have a sixty gallon aquarium around four foot long and two foot wide and high. yesreday in only housed three two inch parrot fish and one three inch upside down catfish. I saw my neighbor moving out of fis apartment, he told me he was leaving his twenty gallon golfish aquarium behind so I took these fish in, lowered my temp to 74 f and added the four goldfish whichal all seem to be in great health except on black moor which has a swollen red eye thats getting bigger. I dont have a hospital tank so after I noticed a few white spots on the same black more ive began treating the enture aquarium with ich cure, stresscoat and alovera chemicals.the spots have decreased but im still going to treat the tank until thir gone. none of the other fish show spots. I know I should add salt to help with the treatment but the only petsore around doesnt carry salt. so how can I save this black moor?! is this a disease or injury? Ive been in the hobby for ten years and I know your not supposed mix cold water fish with tropics but all these fish can can do well at a temp of 74f so could this work? thanks for any help!