We stock a wide selection of hydrometers and refractrometer to help you determine the salinity and specific gravity. We carry all the major brands including JBL, D&D, Salifert, Tetratec and Kent Marine.
A refractometer is a simple and robust way of accurately measuring the salinity within your aquarium and should be used by every serious marine aquarist.
Most people when entering the marine aquarium hobby tend to purchase a plastic swing arm hydrometer due to the low price of these items.
Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Compact and easy to use, the hydrometer can be permanently installed inside the tank for continuous readings.
Its slim, low-profile design camouflages well inside the ta..