Salinity Refractometer for Aquarium Seawater Marine Fishkeeping

It works!

This appears to be accurate and easy to use. Ocean salinity reads just where it should. No batteries or electronics just an optical lens. A little getting used to looking through a lens, like a telescope but easy enough. Really a good value.

Good value easy to use easy to read, easy to clean, seems accurate, consistent with aquarium store and specific gravity test. — I do not have a laboratory grade instrument to test against.

This is so easy to use. Calibrate with rodi water. Quality is excellent, it's easy to clean. Very durable, it's speedy to use too. Have no issues with anything sticking.

I have not owned an expensive version of these to compare it to but it works fine. I calibrated with RO btw at my LFS and it’s been fine. Sometimes you need to get the light just right to read it but that may be normal considering how they work.

handy and reads exact salinity in water very important to keep your tank working up to par

This was easy to learn to use and is sturdy. It comes in a case that keeps it safe, clean, and organized. It’s small enough to fit into my hermit crab supplies drawer and doesn’t need any batteries/charging. Just sunlight!

Works well as long as you calibrate it correctly keep it clean, rinse it off with distilled water after use and store it properly

Accurate and easy to use. The refractometer was exactly as described, well-calibrated, and perfect for reef tanks. Highly recommended!

So much better than others I've tried. Easy to use, accurate and quick results. Great finish and overall feeling of quality.

Es buen día quino cumple con el propósito

Very good refractometer for checking salinity you have to do calibration before use. Good seller responded me about my questions.

Item was as described, arrived on time. Very pleased with purchase