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Mchums

can i use some 9m old unused sand?

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question - i'm moving to a bit bigger tank and I have some CaribSea Arag-Alive sand that I didn't originally use and still in the bag (about 9m old).  I can see through the clear parts some of the green/pink bacteria growing in there.  am i better off getting new sand or I should be good?

Thanks!

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better check the expiration date!  :)

You can just treat it as dry sand..  rinse it well in bucket before use.  If you're still concern about the bacteria growing in there.  After you rinse it well, soak it in bleach water.  Then just dechlorize before use.

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thanks everyone.  So I did go ahead and use it.  BUT, before I did - i put about a cup of it in some salt water and mixed it up then let it settle.  Tested for ammonia and nitrates and both were 0 which was great.   used about 1.5" of sand, moved about 1/2 the water over from my old tank, topped off with new water and matured live rock.  Took about a day for the fog to dissipate and the tank was good to go - it didn't even cycle.

Edited by Mchums

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