Well it's now been about 24 hours since I put the heater in Zifoofs tank, I went and got a good termometer to put in the tank, and it's reading 78 degrees. His eye actually seems LESS cloudy and swollen today than it did yesterday! I changed his water thursday night, and plan to do it again tomorrow afternoon. I have to leave for work soon (I've got two jobs, so it's sometimes difficult to do daily changes..) but tomorrow I am going to buy a testing kit and see what the ammonia/nitrate levels are, I think thats a good plan of action.
As always, I'll keep you guys posted!