The pro series sponge is coarser than the regular sponge, intended to break down debris over a longer period of time instead of being rinsed out. Biological activity is what breaks down the sponge, not water flowing through it, regardless of whether you use an air pump or powerhead. The pro sponge won't clog quite as fast as the regular will with a powerhead, but will still slow down the flow considerably as it accumulates debris. I use the penguin reverse-flow replacement sponges with aquaclear quickfilter housings for my powerheads and other filters as well. Keeps the intakes from clogging with duckweed or other plant debris.