Are you sure your betta is just depressed? Other then your fishie being looking depressed, is he physically healthy? Well, I can't remember where I read it from, but if it's just depression from what I understand, there isn't really much you can do except make sure the water is clean and p.h. level is right, etc.. Supposidly, the fish should come out of it on its own. I did alot of reading before I bought my Cassy.

Maybe little too much. lol But in alot of cases, the water was where the problem layed. ^_^ Hope your fishie feels better soon!