I have my Betta in a Juwel Rekord 120 litre at the moment. His tank mates include, Cherry Barbs, Pentozona, Barbs, Rainbowfish, Shrimps, Tetras and a bristlenose. I am thinking of putting him in a tank of his own, maybe a 22 litre, as I have seen a Aquael one I like. The reason for this, is...