I am setting up a 55 gallon tank with 2 Marineland bio-wheel Penguin 350's that is almost done with a fishless cycle. I do once a week water changes on my other tanks so this one would be on the same schedule. I'm wanting to do mostly Corydoras, most likely 10 pandas, and a pair of bristlenose plecos. I also want to do some sort of small schooler but I know catfish and plecos are a pretty large bio-load already. I've been toying with the ideas of glowlight tetras, rummy nose tetras or Buenos Aires tetras. What would be an appropriate school size to include that would not overload the tank?