I guess my point was not clear. The live sand I purchased was a waste of money. As I understand, the nitrosomas will not die unless frozen or boiled, but there are no inverts or antything in the live sand. Therefor, it will give you good bacterial growth but no "life" so to speak. That's why I had added a piece of liverock. I'm sure that's where the life came from.
And yeah.... it's like forever. I ran a hose into a 20 gal tank with it about a third full of sand, and with the hose running full force mixing the sand, rinsed for about an hour and a half, just overflowing the tank with milky water. It will eventually come clean.
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This all started with a ten gallon and two clowns.
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