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Originally Posted by Beverly
In this situation, I would either remove the sandbed and clean it in changewater, or remove the sandbed completely.
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Beverly, do think that there is any point in trying to clean old sand? If it is indeed loaded up with PO4, just rinsing it won't solve the problem. A person would have to keep it in R/O water constantly stirring in order to have all the PO4 leach out.
IMO, old sand shouldn't be re-used - it can't clean itself as well as live rock can.
What do you think?
Mitch