A closed loop is basically a pump that pulls water from the tank and returns it directly to the tank. They are used primarily for additional cirrculation. A canister filter could be added to a closed loop, but generally with live rock systems additional filters are unnecassary. The primary goal of a closed loop is to increase water movement to promote stronger coral growth.
__________________
I retired and got a fixed income but it's broke.
Ed
_______________________________________
50 gallon FOWLR, 10 gallon sump.
130 gallon reef, 20 gallon sump, 10 gallon refugium.
10 gallon quarantine.
60 gallon winter tank for pond fish.
300 gallon pond with waterfall.
|