About 3 weeks ago I noticed ich on my fish and the next day I started treating with Interpet Anti White Spot, that had no effect so I tried esha exit and that cleared up a few of the fish. Even after treating with the esha for about a week the spots still wouldn't shift from the Oscar and Firemouth! I decided to change my approach and after a 50% water change I added salt up to 2 tsp per gallon over the course of 2 days and upped the temp to 30 degrees celcius. Now 2 days later only the Oscar has spots but he is covered! I'm also having trouble keeping the temp at 30. It struggles to get above 29 even with a 300 watt and a 200 watt heater in a 90 gal (my house is cold). I put a blanket on top of the tank and the temp raised to 31.5 which I think would be too high for the fish, even though the were still acting normal.. Will 31.5 be too high for a JD, a Firemouth, an Oscar, an Acara and a Senegal Bichir for a week or two?