I'm considering modifying my Whisper Micro (70gph) to be a reactor and biological filter.
If you aren't familiar with these, they are internal, with a small pump at the bottom, and a long plastic basket/chamber above. The basket is meant to hold Whisper "Bio Bags". Water flows up behind the bag, then through it and out an overflow at the top front of the basket.
I want to take out the bag, and place a CO2 airstone in the bottom of the basket. I'll put a small layer of poly on top of that, then fill the chamber with BioMax media.
Comments? Would this setup (namely, the poly) place undue back-pressure on the pump?
I'll post pics of the mod if I decide to go forward.