Red Sea Seawater Refractometer control and monitor The plastic coated temperature sensor

The plastic coated temperature sensor is waterproof and suitable for use in a marine aquarium

1 L (500 g) per 1000 L (260 US gal lqd) aquarium water if applied in a flow-through filter unit

Unclogs gravel/coral beds

Built-in manual neck cleaner

Ergonomic grip/flip handle for easy flipping  from Scrubber to Scraper

Red Sea Seawater Refractometer control and monitor The plastic coated temperature sensorRed Sea seawater refractometer Integrated automatic temperature compensation Red Sea 'Reef Spec' guarantee Red Sea's seawater refractometer is specifically designed to measure absolute salinty of seawater for reef aquariums. Calibrated for seawater. Measuring the salinity of seawater with a standard refractometer calibrated for brine (NaCl) solution will result in a deviation of up to 1. 5ppt.