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3 gpm) 45 MD7 700 gph (11
it’s an easy upgrade for any old style filter still using filter
5” L x 11” W x 13” H
The shaft is 7/8” diameter
The box is made to stack and lock together
Premium Salinity Refractometer Probe 3 gpm) 45 MD7 700Largest and sharpest scale display available. Calibration ring for simplified calibration. This refractometer features a magnified scale for better visual accuracy. Other features include solid aluminum construction, a rubber gripped body and temperature compensation between 10 and 30C (50 to 86F). To calibrate, simply loosen the handset screw, place a few drops of water on the prism, turn the calibration ring until the shadow line is at zero and
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