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#1
07-13-2017, 03:41 PM
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Ill head to j&l to get a salinity calibration fluid to check my refractometer. Ill do a 30g water change in 5 days interval to see if i can get mag up through water changes before i dose.
I just switch from AF salt after using up last of IO bucket. Will test the new batch of salt mix to see if lines up with their test included on the bucket 
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#2
07-13-2017, 07:59 PM
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If you have one parameter low, it's usually cheaper and easier to just add that in, rather than water changes. You can buy the bulk chemicals for relatively cheap compared to salt mix.
Usually however if all three are low, the salinity is low, so some calibration fluid is a good idea.
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recalibrated my refractometer and slowly raised it up by 2ppt per day. Lesson learned.
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