I only just joined, stumbled here as I am considering a tank mate for my Betta. I bought him a couple months ago. I hadn't had one in many many years and decided to go with an orange one. The tank he lives in is a 10 gallon with about 25 baby snails and some healthy plants. I am thinking about moving up to a 20 gal but I hate to change anything. The reason is before I had 5 neons and one full grown snail, which is where all the babies came from.
Shortly after all the babies started showing up the tank water turned completely green. I haven't had a tank in a long time and I made a major mistake and changed most of the water, knowing better. The neons died within a few hours

I was pretty sad about this so I left the tank empty for a couple months except for the snails. During that time the water cleared up and the plants grew well. So I went to good old wal mart and looked at bettas and immediately picked up the orange male as he had hints of blue in his tail and I just liked him. I never expected him to be so aggressive, though. He right away began to harass the big snail. I let this go on for a little while until I decided to try and take the snail back to wal mart, only to find the next day betta had eaten him!
He doesn't bother the little snails much. He does, however, either try to attack me or his reflection in the tank? So I am afraid to get another fish. I was considering a catfish or plecostomus as the algae is thick in a few areas..but I don't know I am afraid of killing any more fish! Perhaps he is one of the loners..
The betta I had when I was a kid lived with a female betta and a shark and an oscar in a 55 gallon tank and they were all happy together. This guy is not so mild mannered
I don't know anybody have any thoughts? I have so far been not so good a fish owner as I was when I was a kid that's for sure.
mp