Maybe if you had your CO2 going through your impeller, but attach the reactor to the output.
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75 Gallon
Rena FilStar xP3, Hydor ETH 300W, Coralife 48" Aqualight 260W 6700K, Rex Grigg Regulator with Ideal Valve, 10 pound CO2 cylinder. :: ADA Aqua Soil Malaya and ADA Power Sand M
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