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I did cook the rocks in a cooler with 2 power heads and 2 air stones for about 2 months doing water changes at least 2 times a wk but know filter. the l/r was out of water for about 4 months so when I put it in the tank, by the way theres nothing else in the tank with the l/r, I was advised to put some pieces of new cured l/r in the tank with them. Now I am trying to do water changes 2 times a wk atleast
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