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Old 07-16-2013, 02:45 AM   #12
DeeFromBrooklyn
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While I only use a aquaclear 50 on my tank I do add air to sustain that which the plants use at night. The ph swings are high at night. Once the tank is established the fish and plants create a natural symbiotic relationship. High movement forces gas exchange at the tanks surface. In a low tech tank less exchange is good.
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