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Old 05-01-2011, 03:16 AM   #11
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My LFS says they're SW is at 1.023, but when I test it with my refractometer (after calibrating with RO/DI water), it sometimes says 1.020-1.023. They have a refractometer also. Who should I trust? maybe I'm not calibrating correctly?
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Old 05-01-2011, 03:22 AM   #12
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If equipment is the same, I would always trust my own judgement over someone else's.
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Old 05-01-2011, 09:55 AM   #13
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Yeah that's what I'm going do Becasue I know I'm doing everything the correct way and they might not be u know
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Old 05-01-2011, 10:25 AM   #14
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In your case, I would go with the LFS. That is why I said if the equipment is the same I would go with my equipment. In your case, the LFS is using superior equipment to yours. Please do yourself a favor and get a refractometer. Your fish will thank you, because I can say with 99% certainty that the hydrometer is off.
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Old 05-01-2011, 11:27 AM   #15
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Get some calibration fluid for your refractometer. 53.0mS Calibration fluid (mine is Pinpoint brand from American Marine) is 35 ppt. Calibrate your refractometer to that instead of RODI water to be sure you are accurate at the range you are testing.
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