I'm growing out a bunch of plecos in a 40breeder. I will eventually try to breed L128s in this tank. I have 4 about 3" in there now and another 3" in a 75g that will be moved as soon as I can catch the little sucker. I also have 3 L333 under 2", L204 around 3", L007 around 4.5", L387 under 3" and a Super Red about 1.5". I vac up the poop every other day or so that means a 5g w/c and about 50% water change every week. Nitrates stay under 20 before the 50% w/c.
I also have 9 guppy fry (1/2") and 4 M trifasciata rainbowfish juvies (1") in the tank.