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I've been kicking around the idea of achieving the same process by just using white rice and started with a cup of rice in a sock where my overflow water enters the sump. This is also close to where the inlet to my skimmer is located. I've been doing this for the past 2 weeks. The rice grains are getting a nice brown coating of bacteria and not falling apart at all. I'm think I'm essentially getting solid carbon dosing at about $1 a lb. I've stopped my usual alcohol dosing and still getting very good skim like I was when dosing alcohol.
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