I have had my male betta in a small bowl for months and finally decided to get a bigger tank. I went out and bought a 5 gal hex but while I was at Walmart getting it, I saw a 10 gal tank too for the same price. I was thinking of maybe eventually putting a couple tankmates in there with him, and now that I have the 5g set up, it looks nice but I wonder if I should have gotten the bigger one if I want to put more fish in there. I like how quiet the hex is and hope the other one would be the same way. Another thing I just realized is, he has been constantly swimming in there since I got it about 5 days ago (swimming fast, up and down, back and forth, from corner to corner). I had been turning off the filter to try to feed him and he hasnt eaten until tonight I turned it off and left it off for awhile. He finally seemed to calm down a little bit and actually ate. Would a bigger tank have more calmer places for him? What do you guys think? Should I keep what I have and maybe just leave him in there alone, or get the other?