Digital Salinity Meter 3-in-1 Saltwater Tester – Specific Gravity, Salinity & Temperature Pen Hydrometer, High Accuracy Water Quality Tester for Aquarium, Marine, Pool, Hydroponics, Aquaculture

Works perfect on my saltwater fish tank. Gives accurate readings have purchased many others and had to return because they did not work so far this one has been spot on and I am very happy with it a very important thing to have when owning a saltwater fish tank.

Very easy operation and works good.

Thanks for the fast delivery. I like that this item came calibrated from factory. Easy to use.

Makes life easier!

Pros: Couldn't be easier to use, clear screenCons: No recall, actual usage deviates from the instructions (on, wait for ready with 0000, dip until screen flashes, click though values), limited range (i'm sure it's fine for a fish tank)

So I like this hydrometer a lot. I like it so much I bought another one after I dropped the first on in my fish tank and ruined it.

Works Fine

Reads the salinity in less than 30 seconds