WHen stacking Sponge filters do i put the air line all the way to the bottom sponge's bulls eye or do i add it to the top one with the lift tube to it.
i tried, but failed to get the air line tubing cut to the proper length to get the air stone into the bottom section, so i just put the air stone in the top section and went on my way. it would probably be better if you could get it to the bottom section.