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Quinhydrone Is NOT pH 4.0 solution. Ph 4.0 is for low range calibration for use on freshwater tanks.
Quinhydrone Is a compleatly differant solution used for ORP calibration.
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Originally posted by yellowslayer13:
"I hate that hole"
Current Tank Info: SCMAS Member 225 peninsula euroreef RS180 Apex 400W X 3 20k radiums / Spectra mixed SPS
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