I have 2 tanks.. a 2.5 gal pico..acan dominated and i change 16 ozs of water 2 times a week on that one..hob filter modded to keep cheato in it..

35 gal hex is a mixed reef with hob overflow with a 10 sump..about 42 gallons total water volumn..i change 4 gallons on this tank every week.dose mb7 on this tank and it has a prism hob skimmer on it.

Rick