Can remain submerged inside aquarium so you can view your salt lever at a glance. Compact design allows for discrete placement in your aquarium or sump.
Submerge hydrometer approximately 15cm below the water line. Attach to glass in desired area using suction cup. If necessary, gently tap hydrometer to dislodge any air bubbles. Read specific gravity on scale. Recommended specific gravity is 1.020 to 1.024 for most marine aquariums.
Note: For first time use, submerge hydrometer for 24 hours before taking initial reading to allow the needle to be seasoned.