Assuming this is your present stock list/set up.
I have a 175g bowfront, overstocked with 1/22" rtg, 2/8" ntt, 3/&" parrots, and 7/6-11" royal plecos. 1 eheim 2262 with 2/33% water changes a week seems to keep on top of things, although the royals do increase my filter maintenance.
IMO you...