I'm getting a 3.5 tomorrow. I fell in love with a betta tonight and tried using th split in my 5 gallon because it is black and 'should have' been enough to make sure they couldn't see each other and I was advised this should have been okay but apparently they can.... is there a way to transfer one of my filters to the new one to help the cycling? He is a half moon and he likes to lay on my moss ball or on the sand because his tail is heavy but the leef bed I had rusted so I don't wanna buy another. I know I'll need a heater and TSS and sand but is there anything else?? I need info ASAP because if my first betta doesn't relax a little I'll have to put lucky in the cup and just keep the water warm till the store opens. Here he is for reference. Also if anyone has ideas for a "bed" I'd appreciate that a lot!!!