Okay, so right now I have a male and female Betta in a 10 gallon that is split in half by a divider. I have had my eye on an orange dalmatian male for three weeks and am not happy by how he looked when I saw him today:/ something is wrong with his fins and he has lost a lot of that initial spunk he had when I had seen him previous days. My question is, can I split my tank into thirds so I can get him? Or is that not ideal? I do have an isolation tank I used when Odin was ill, and i thought of housing him in that, but I doubt this Betta would be happy in a dainty 1/2 gal.