FOMIYES 2pcs High Precision Hydrometer Salimeter Densitometer for Aquatic Use Easy Measurement Tool for Fish Tanks Swimming Pools and Aquaculture Calibration and Practical

Hydrometer specific gravity: suitable for saltwater, swimming pool, aquaculture, aquarium (seawater) and pond.

Professional aquarium test tool: it is convenient to test the specific gravity and temperature of water.

Aquarium salinometer: fine iron sand in the tool, particle symmetry, measurement more accurate.

Professional hydrometer: - placed in any corner of tank, floating design, automatic temperature/ test. they are and reuse. we also brew and answer your questions or doubts here.

Sea water testing tool: made of glass materials, safe and , with excellent texture.