Quote:
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Originally Posted by StirCrazy
Quote:
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Originally Posted by reef_raf
. Old sand has PO4 leached into it's surface pores and only acid will remove it. .
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SO if only Acid will remove it then it woulden't be a problem in the tank as we don't keep are tanks acidic. PO4 is natural bound to the Calcium carbonate and can be liberated by bacteria and other means. I will try dig up that article on the PO4 cycle it is good reading.
Steve |
What about the lower PH level in the anoxic area of a sandbed?
EmilyB had higher calcium levels in her tank than the new salt water with the water changes and I think that it was coming from the sandbed partially dissolving.
With the low water movement levels in a sandbed, the lower areas of the sandbed are basically sitting in a "soup" of concentrated detritus, so it can't help but equalize with it's surrounding water and become further saturated with PO4...right?
Live rock won't have that problem as long as there's sufficient water flow.
Mitch