Hydrometer TK-505

Hydrometer TK-505 Aquarium Systems

The SeaTest Instant Ocean is a user-friendly scientific instrument that measures both relative density as well as the salinity in warm water aquariums.
It is specially designed to accurately measure a wide range of relative density from 1.000 to 1.030 and salinity from 0 to 0 ppt.

That’s why measuring salinity is an important part of owning a saltwater tank. A good hydrometer does exactly that. With some brands claiming accuracy to 0.001 specific gravity units, it could be the perfect tool for monitoring your salinity levels.