There are a couple of shrimp in there that came along with the plants when I moved them from the 60cm, I have seen the Betta chasing them on occasion in the middle of the tree branches. I will have to take a more updated snap to show you guys how the tank is doing. I am surprised there is no algae at all, and the buces grow very fast and flower often! The ferns on the canopy do struggle a little, that has now a lot of buces in there and also some moss mixed up.
Yeah the tank is actually 35cm tall, and Betta stays mid to top, and corry stay more at the bottom, but the corries like to shoal around the tank which is nice to see , and on occasion the Betta mixes in with them, very rare chases them, usually the food drops on the sand and he goes eating together with the pigmy's
I might move some more shrimp in there since I have loads in the 60cm, can't even remember the species name, I got them of Chris Lukhaup (ShrimpKing) at Vivarium in Holland back in 2012 on the UKAPS Roadtrip, they were wild caught and at the time a new species not available in the market
they been breeding and doing well since (they are just not that exciting).
I think for a Betta and some little corries this tank size is more than adequate, did wonder if it was feasible to add more fish, hence the topic, but looks like it will remain as is