Assuming the substrate is one you like and it is not covered in algae there is no need to replace it. I have removed/replaced sandbeds many times with no ill effects. I would recommend that you give it a good rinse to remove the build up of sediment/detrtitus. IDEALLY use RO water to do this, however regular tap water will also work just fine. Rinse in a bucket until the "brown" stops coming out of the sand and replace.
Quote:
Originally Posted by rynoe
After spending the last four months reading what seems like every post on this web site I am finally getting my tank on sunday. I bought a established 72 gal bowfront with some soft corals and a couple of clown fish. I was down at ocean aquatics and they suggested I replace the sand. Others have said to just clean the old stuff and re use. What should I do. If I do clean it do I just use fresh water?
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