crushed corals for additional filtration?
Posted: Fri Dec 06, 2013 2:22 pmHello, so i have a 10g with a built in wall for filtration and has a biofoam and ceramic rings. I would like to remove the biofoam and ceramic rings and add live rocks then install an overhead tray. So my question is, is it better to add crushed corals in the overhead tray or should i just stick with the biofoam and ceramic rings or some wool? thank you
PS. this will be FOWLR tank
PS. this will be FOWLR tank