Hi everyone I was wondering if anyone had any tips or tricks to change out crushed coral for sand. I've got a 90gal cube tank that has about an inch of sand on the bottom and about an inch and half of crushed coral on top. The reason I want to change the crushed coral is that it's stained green and so not liking the look. I've got fish and coral that I don't want to die. So any help would be appreciated. Thanks.
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