Caught a little five inch smally on a barbless hook. I put him in a 55 gallon with sand, pebbles, and driftwood. I was wondering about what size should I consider moving him to my larger 125 gallon? I just put my oscar that was in the 55 into my koi pond. I had to fill that void, if you know what I mean. He's doing very well, cruising along and around the driftwood structure. I put a little crawfish I caught in my backyard stream in the tank, which was immediately inhaled. A bit surprising because I caught him about 20 hours ago. Oh, and this is my first post...aloha to you all MFK people out there!