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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.
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Mike, I understood what you meant, I was just clarifying for Scooter.
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As for adding a drain system to the bottom layer of the plenum, how effective would that really be? Wouldn’t you need a strong current to ensure that the debris gets pulled into the drain? My concern is that the debris has had time to settle on the bottom of the tank and wont want to move very easily.
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Michelle, for purposes of this discussion, assume that the plenum drain is at least 1- 1 1/2 inches in diameter. This should suck out whatever is in there. If its done on at least a 6 month interval. If your not gonna get it out w/ a gravity drain that size, I doubt that a power head attached to PVC plumbing will work either. Just my line of thinking, could be wrong....
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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.
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Mike I agree, no worries about the financial mind influencing the discussion.
Nick