I am running two cannister filters at 700 g/h each! I also have a two tank sump and refugium on a 55g. Was having problems with filtering with just my sump and refugium, water stayed cloudy. Weekly cleaning of filters help a lot . 0 nitrite, ammonia, and nitrites. 60# live sand in tank and 30# live rock in DT and 20# in refugium with some chaetomorpha in there. I have a copper problem that is from a brass fitting in the tank so no inverts allowed which is cool, for now. Most likely adding fish this weekend.
2 percular clowns
10 green chromis