For anyone setting up a marine fish tank, getting the salinity of the water right is crucial. Too low or too high can harm marine fish species and corals, so getting it right is the first step to a perfect marine aquarium.
Available from 123 Aquatics are a range of marine hydrometers, which measure the salt content of your aquarium, from a range of reputable manufacturers such as Tetra, Red Sea and Instant ocean. For those requiring a more accurate measure of aquarium salinity, we also stock D-D marine refractometers. These high quality instruments offer greater precision and reliability of results than the more basic swing-arm aquarium hydrometers.