I got an Oscar 9 or so months ago, had a 10gal tank he seemed kind of happy until he started getting sluggish. I was told I needed a larger tank. Got a 29gal about 7 months ago and he seemed okay up until a couple of months ago when he started getting sluggish. I then realized that I wasn't changing his water frequently enough. Went to monthly 10 gal changes, then I started seeing a hole in his fin, went to the local fish store got some medication and now Fin-again is no longer here. I never thought it would be easy but I would like to know if I'm just doomed or if I can actually keep a fish alive for many years.... hence the name SadFish.