Interesting info on sponges.
My current sytem has 50% live rock and is covered in sponges under all the rocks.
I have always used live rock, since the 80's, and feel its why I have had great success over the years.
I can remember when I firist heard about Steve Tyree's sponge filtration it seemed so obvious and his corals were part of why I stopped using skimmers back in the 90s. It still blew my mind though reading de Goiej's research just how fast sponges were recycling DOC and putting it back into the food webs. Literally doubling in just a few hours but not growing?!?! I think the papers listed are just scratching the surface of thier roles in maintaining healthy reef ecosystems.

