well my 13.5 has a 10.9 gallon display, and a 2.6 bult in sump/fuge. i have cheato, LR rubble, chemipure, and phosban
my params are
ammonia-0ppm
nitrite-0ppm
nitrate-10ppm
at the moment i have a maxi 900 (230gph) for my return, is that too much flow for clowns?