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- Aug 12, 2019
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Question: I am transferring my existing 40 gallon reef tank to a 65 gallon and would like to use some of my old sand bed. What is the best way to do this? My plan is to only use the sand which I am able to thoroughly vacuum days beforehand and to ditch the rest. This leaves me with ~80% new sand to ~20% old sand. How would you go about combining them safely?