I picked up a 5 gallon tank, filter and all at the flea market last weekend for 3$. It is a hexagon tank. I'm planning to put one of my male betta fish in this tank. However, my question is - what kind of tankmate (if any) would be suitable for a 5 gallon tank? I've read about different shrimp and snails but I guess I'd like to know is a 5 gallon big enough for tankmates for my male betta and if anyone else has had good experiences with tankmates in a 5 gallon tank. Of course I will do what is in the best interest for my betta and leave him in there alone if that is a better decision. I currently have 5 male betta's total and they are all happy in their own 2.5 gallon+ tank. The betta I'm considering upgrading into this 5 gallon tank is shy and playful but not too aggressive like some of my other males. I'm just nervous that since he is a HM, other fish might nip at his fins.