I have a FX5 AND 30 GAL. ACRYLIC SUMP ON MY 180, which has 6 RBP, and 3, 12-14 inch plecos. The plecos are pretty messy, but I thought or think my tank should still keep a little cleaner than it does. Alot of particles get kicked up when the fish move around, but the water remains crystal clear. Any suggestions?? How often does everyone take there cannisters apart for cleaning? ( I do at least a 30-40 gal water change weekly-10 days.)