Angoily 2Pcs Glass Hydrometer Float for Aquarium Saltwater Specific Gravity Glass Densitometer for Accurate Concentration and Temperature Testing

Pram meter--it is easy to use and suitable for fish tank and aquarium,glass float meter

Glass densitometer--made of premium glass material which can directly with water,glass float meter

Hydrometer--it is convenient to test the specific gravity and temperature of water,glass float meter

Glass float meter--placed in any corner of the fish tank, floating design, automatic temperature/ testing,hydrometer

Light meter--in the aquarium, it is convenient to measure the specific gravity of the sea water and provide convenience for raising fish,glass float meter