I know the rule is 150 lbs per tank. Although I am going to be running a FOWLR tank so I figured I can have a bit less live rock since my stocking won't be nearly as high as a reef tank. I currently have 120lbs of live rock in a 150 tank and the 55 gallon sump is running a small amount of bio balls which I intend on removing as I add more live rock. Can the 120 lbs of live rock do the job right now without the help of the bio balls????? This may be a dumb quetsion although since my system is a 150 gallon tank and a 55 gallon sump. Assuming there is about 35 gallons of water in the sump, would my tank be considered a 185 gallon??? and I should use all measurements of live rock, equipment, dosing etc all by 185 gallons???