Fluval Sea Hydrometer

Description

Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Regular testing is strongly recommended as stable salinity levels are essential for the health of marine fish and invertebrates.
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 tank and will not diminish the aesthetics of the aquarium. It has large, easy-to-read markings with ideal salinity range clearly marked in green for clarity.
The Hydrometer can also be used as a portable device, allowing you to take samples simply by submerging it in the water.

Provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums
Regular testing is strongly recommended as stable salinity levels are essential for the health of marine fish and invertebrates
Compact and easy to use
Can be permanently installed inside the tank for continuous readings
Slim, low-profile design camouflages well inside the tank and will not diminish the aesthetics of the aquarium
Large, easy-to-read markings with ideal salinity range clearly marked in green for clarity
Can also be used as a portable device, allowing you to take samples simply by submerging it in the water

Fluval Sea Hydrometer for Marine Tanks in SG

The Fluval Sea Hydrometer is a simple, affordable way to keep tabs on specific gravity in a marine aquarium, which is one of the most important parameters for the health of saltwater fish and invertebrates. We recommend it to nano and first-time reef keepers who want a quick visual check without the cost of a refractometer. Its slim profile lets it sit discreetly inside the tank for at-a-glance readings whenever you walk past.

Stable salinity matters even more in Singapore, where strong evaporation in our warm flats steadily concentrates the salt in your tank between top-ups. We suggest testing regularly and topping up with fresh RODI water to hold your gravity steady rather than letting it drift upward. The clearly marked ideal range makes it easy to spot when a top-up is overdue, especially if your tank sits in an air-conditioned room that pulls humidity quickly.

See more in our marine equipment range. For accuracy, compare tools in our hydrometer vs refractometer guide, and our mixing saltwater at home guide covers getting your salinity right from the start.