extreme ph fluctuations

  1. C

    Extreme daily PH swings in Aero60's

    I'm having trouble figuring out what to do about all the PH up I am spending so much money on right now for two separate 40 gal. res's that go from a PH of 6.1 at the start of the light cycle to 4.5 by that time the next day. What am I doing wrong? In the meantime I've been adding almost over a...
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