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ok one more question.. i am building a new sump/lagoon. i am makeing a tank somewhere around 12x4x30" deep. i will use a major part of this as a RDSB and a sea grass/macro tank. with the sea grasses i know i need at least 6" of sand.. should i go with like 8-10" to aid in the added nitrate reduction. i am fighting nitrates of about 50ppm with my current BB set up.. i have a really really hi bioload as well.. lmk what you think
thanks
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