my tank is very peaceful actually. there are very few altercations, as for the bala and common pleco, I know they grow big, they will get new homes as they grow, from my 15 to a new 40 in my bedroom when I get it setup. water conditions are fine.
EDIT* I know the neon is a schooling fish but my dominant platy did not like them. He's settled down now since I got the shark and gourami. so out of the bunch I had this poor feller is the only one left....the rest of the platys are juvies, so he just schools with them...he's happy now. I noticed tho when I turn off the lights, He freaks for a sec or two...but other than that..no problems.