U need to increase the number of albino cories because they are school fish and they do better in groups. Your tank can hold more fish since not all ur fish that you have will grow big.
If they're anything like mine,I've got a group of 5 pandas,they'll 'play'.It's quite a sight!
Best to get groups of all the same kind.(btw,in my opinion,this also LOOKS better in the tank than a random selection).