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- Siphon starter and water flow indicator chamber
individual
Raises pH and supports coral growth
zooplankton
Recommended Alkalinity concentration = 7
REFRACTOMETER WITH SEAWATER CALIBRATION test kits - Siphon starter and waterHand held instrument for the measurement of the TRUE Salinity and Specific Gravity (S. G.) of sea water by refractive index. What is different about the D D Seawater Refractometer? Almost all hand held salt water refractometers available to the hobby are designed and calibrated for the testing of brine solutions, i. e. sodium chloride, and are not calibrated for the refractive index of natural sea water. Even though the largest percentage of salt in
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