im planning a closed loop for my 125 gal. its being used to basically divide a room so only one of the 18" sides are on a wall. i was curious if there were any advantages to having the closed loop returns come from under the sand bed at the bottom of the tank or from the top of the tank blowing down on the sand bed or should i try to configure a way to do both?
HOB closed loop
- Thread starter Latimer
- Start date
