Yes, good luck indeed. I know how it feels, I can only imagine how amplified it would be in a tank of this stature.
I'm sure you've checked, and sorry if I've missed the info, but you've confirmed that you're not getting a NO3 reading? Elevated NO3 can depress your pH somewhat.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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