Do you mean for the Mg or the PO4? If PO4, sure, probably; if Mg, it probably doesn't matter morning or night, but if you get a reading like 2400 again, maybe do a second test right away.
Where the SG's the same between the 950 and 2400 readings on the magnesium?
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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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