Scoot, sorry I am lost abit here. Are you talking about the sand clumping together or waste clumping together???
Nick the concept regardless if just draining or using a PH, is that Oxygenated water will take over position in the plenum zone (not air). This oxygenated water will stop the bacteria from fixing oxygen until they use up the oxygen in that zone, then once again they will fix nitrate. When doing this flushing no air can ever be aloud to get in thier, Which is easy to accomplish.
Nikki I love it
This is the way good things happen, no more here has monitary motives (no books to write or speaking engagements) this keeps the conversation pure, we have folks from many different schools of thought all putting in thier knowledge, it dont get better then this.
I think Doug will agree this reminds me alot of the old days.
Mike