Hi all! I am thinking it is getting time to put my betta "to sleep". He is swelling up like a balloon and has been since October. I think it's fluid build up but I can't get it down. He still seems like he isn't fazed, swimming and such as normal but I know it's coming. He had a tank mate. A nerite snail. At this time, I don't think I want to get another betta just yet so the snail will have a 10 gallon to herself. Do I still need a filter running? I plan on leaving the heater in there but turned down to about 73. I don't have tall plants so I was thinking of lowering the water level to about 7 gallons. This shouldn't have any ill effect would it? Would she still have enough stuff to eat? I have snail food as well but she doesn't seem to go for it as she's always cleaning the tank.