A friendly reminder to check your Sg / Salinity.
I haven’t checked Sg in a couple of weeks. I normally keep the Sg between 1.026 to 1.0265. My main display tank is fed a lot of frozen and liquid food and Sg creeps up over time. Sg was reading 1.0272 - 1.0274 according to the TM Precision hydrometer.
Some different instruments for comparison.
$125 Milwaukee digital refractometer. This was calibrated a year or two ago and hasn’t needed calibration since, but it also has been barely used. The reading has always been accurate, but I don’t use this because the reading accuracy is +\- .002.
$35 BRS refractometer. This had to be recalibrated tonight. The initial reading was off by .001 - .0015.
$35 TM High Precision Refractometer. Only used to calibrate the refractometer.
$10? Hydrometer from Amazon. I received a good one that is accurate but the scale is difficult to read. I don’t use this because of this.
$10 Swing arm. Still needs 24 hours to “season” the needle, but it’s looking pretty good.
I haven’t checked Sg in a couple of weeks. I normally keep the Sg between 1.026 to 1.0265. My main display tank is fed a lot of frozen and liquid food and Sg creeps up over time. Sg was reading 1.0272 - 1.0274 according to the TM Precision hydrometer.
Some different instruments for comparison.
$125 Milwaukee digital refractometer. This was calibrated a year or two ago and hasn’t needed calibration since, but it also has been barely used. The reading has always been accurate, but I don’t use this because the reading accuracy is +\- .002.
$35 BRS refractometer. This had to be recalibrated tonight. The initial reading was off by .001 - .0015.
$35 TM High Precision Refractometer. Only used to calibrate the refractometer.
$10? Hydrometer from Amazon. I received a good one that is accurate but the scale is difficult to read. I don’t use this because of this.
$10 Swing arm. Still needs 24 hours to “season” the needle, but it’s looking pretty good.
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