
Big claws are a no-no. Other than that I can't think of anything.
That's a big tank for just a betta and some inverts lol

Harlequins are nice too, but just don't get as many as they get bigger than espei
One thing I've noticed with them is that when the lights are on they stay towards the bottom and are competing for space with the corys. However, when the lights go off they begin swimming in the middle of the water column. I'm thinking that my lighting is perhaps just too much for them. 
rummys are pretty active from what I gather so I would try removing them firstThe corys become a little less active as they settle in too. He's probably just having to adjust
oh and corys are a nightmare to catch lol
