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1. Yes
2. Technically maybe, but not worth it. YOu could use GFO and waterchanges to remove most of the PO4 from sand... you would just spend more than you would on brand new sand. The sand may be almost full or it may have years left, so I would go ahead and jsut get new now.
2. Technically maybe, but not worth it. YOu could use GFO and waterchanges to remove most of the PO4 from sand... you would just spend more than you would on brand new sand. The sand may be almost full or it may have years left, so I would go ahead and jsut get new now.
