I have noticed an odd pattern in my experience with bristle-nose plecos. I had an albino and a standard pleco in my 125 and the tank was always clean, but when the brown one died my tank got funky in a hurry. The albino ended up dieing during an extended power failure. Fast forward to today, I put two brown 1" in my 300+ tank and they cleaned it spotless in a couple of days. As an experiment I put two 1" albinos in the 125 after a thorough cleaning. They are slowing down the regrowth, but the algae is defiantly starting to reappear on the glass and rocks. Is this something anyone else has noticed?