Great that this product measures 6 inches below the surface of the water. So many times, the tool measures at the water surface which can give you a bad reading.

Pros: Great product

Cons: none

Easy to use, gives consistent readings, and lots safer than the ancient mercury-filled hydrometer I used to use.

Pros: works perfectly

Cons: none

So far this seems to be a very reliable little tool for our reef. Its incredibly easy to use and read.

Pros: Easy to use

Cons: Plastic

This is not expensive and it is accurate and easy to use. A necessity for saltwater tanks.

Pros: easy to use

Cons: none

A must have for saltwater aquarium setup. This hydrometer is accurate and easy to read.

Pros: Easy to Read and Accurate

Cons: none