Ah, okay, I see whats going on there. I unfortunately won't be able to submerge the drain line below the water surface like that, as the water just free-falls from the overflow grating into the chamber. And its the sound of the water falling that is irritating -- if the rock needs to be submerged this won't work as well for me...
Hmm, I guess I could just fit some filter foam in the space underneath the overflow grating, essentially allowing the water to flow through that.... I suspect it'll become a nitrate factory, however.
Hmm, I guess I could just fit some filter foam in the space underneath the overflow grating, essentially allowing the water to flow through that.... I suspect it'll become a nitrate factory, however.