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Adjustable feeding time (1 to 59 seconds)
The 60% Brix Calibration Fluid comes is an Amber 4ml Vial and is about half full with 1
not "carbon" plastic - 50% heavier than the soft case units
The Plato scale is based on the relationship between sucrose and refractive index
Marine Depot Pro Salinity Refractometer for Sea Water freeze point Adjustable feeding time (1 toThe Marine Depot Pro Refractometer is a high precision, handheld tool designed specifically for saltwater aquariums and reads Natural Sea Water, featuring a focused, expanded scale (1. 015 1. 030 specific gravity) for easier reading compared to standard models. It includes Automatic Temperature Compensation (ATC) and a durable construction, making it ideal for monitoring reef tank salinity with greater accuracy than hydrometers. THESE ARE BRAND NEW IN