I run GAC and phosguard in my canister(canister is cleaned with water changes,every 2 weeks)
the tank is 6 months old
Water changes every 2 weeks, 5Gal
lighting is VHO, bulbs 3 months
Have a remora skimmer, getting about 1/3 cup a day
have 5 fish and feed every other day
I use RO water
Cal is...