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Spiking Ph...
So I was wondering, I am using a flood and drain with rockwool, 4x4 tables with a 40 gal res's.. My ph spikes every day, I check it twice a day and every time I am taking it from at least 6.5 down to 5.7.. Anyone got any idea's why it's spiking... I know it's suppose to creep up but not spike a whole point up.. don't most hydro sys's maintain a steady ph? thanks for any help...
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