Originally Posted by bavass
Bio Beads will not really lower PO4
that much. They are more for NO3
and remove some PO4
by over working the skimmer.
It takes about 4 parts carbon, 4 parts nitrogen and 1 part phosphate (and various other stuff at small levels) to create biological biomass, at least I think thats the formula I remember from biology class. The beads are the carbon source, so you deplete phosphate before the nitrogen as the bacteria multiplies. So they should work on both. But I am still skeptical. It does look like a controllable carbon source for beneficial bacteria that might be more dependable than vodka.