Oh...I'm confused. Drip tray area is the wet/dry...stuff above water = dry, stuff below water = wet. Wet/dry. No? :S
Yep if the media is above the water and water trickling down, yep a wet/dry or a trickle tower for the freshwater term
I am going to use my old sea clear sump that I had for my reef tank, and fill with water to submerge the bioballs, and run air stones from an air pump under the bioballs making it a moving bed.
And with filter pads above it where the drip tray way.
Love the idea of keeping the sump for my 75 gallon planted tank, constant water level in the display tanks, no surface scum, and hide all of the equipment, Probably make use of a phosban 150 reactor as a CO2 reactor down in the sump as well if deemed necessary.
Have a nice CPR 100 overflow, with a aqua lift to keep the syphon auto start.