I have some curved glass tanks with overhead filters/lighting. In the 27 gallon tanks, there is a media tray about 12" long with a spraybar, and then a second chamber of about 4" with no spraybar before exiting back into the tank. What media should be used and how?
I have a curved glass 66 gallon tank with two media trays, each is 14"L x 6"W x 4"D, and each is covered by the spraybar. What media, where and how should I use?