Red Sea Seawater Refractometer Batfish Arag-Alive sands clear quickly and

Arag-Alive sands clear quickly and contain millions of live bacteria

Tannins can provide a natural tint to the water

Used the world over for more than 12 years

with higher dissolvability of our new & improved formula it only takes about 20 minutes from bucket to tank

Pond Matrix™ is compatible with all types of wet or wet-dry filters

Red Sea Seawater Refractometer Batfish Arag-Alive sands clear quickly andRed Seas Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25C 77F. Most refractometers used within the aquarium hobby are not specifically designed for reef aquariums and use an algorithm for the measurement of brine (NaCl rather than seawater) at a temperature of 15C 59F rather than 25C 77F. Thus, a measurement deviation of up to 1. 5ppt is possible, which can have a significant