If my intakes are at the top 1 - 2 inches of the tank, and the retun is just below the intake level; am I not just filtering the same water over again?
I used to keep the return on the bottom of the aquarium but moved it back to the top so i could get some better current and water circulation. Did I mess up by doing this.
I used to keep the return on the bottom of the aquarium but moved it back to the top so i could get some better current and water circulation. Did I mess up by doing this.