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I am planning to put some sand in my established 10g tank...specifically at the left area divided by the wood (see pic below).
But not really sure how to put the sand in. Do i just put it in, or is any kind of barrier necessary? I will just be putting moss on rocks on the sand later.
Thanks.

But not really sure how to put the sand in. Do i just put it in, or is any kind of barrier necessary? I will just be putting moss on rocks on the sand later.
Thanks.