Hydrometer 1.000 to 1.030 specific gravity
Economical and accurate
The only hydrometer I use. I have compared this to a spectrometer before and it got the same reading. I've also dropped this before and it hasn't broke. For the amount I'd say it's a great product but to keep it accurate I recommend cleaning or storing in deionized water after every use.
November 15, 2013
a must have...........
this was my first time using one of these and i love it.easy to read and verry accurate.
October 16, 2013
Works for me
This hydrometer is spot on addi used my refractometer to check on the ability to measure well. it seems to be spur on. The only issuei have is keeping air of the float you have to fill the hydrometer with water slowly. Over all I would rate it 4.5 out of 5 stars.
July 4, 2013
I bought the Instant Ocean Hydrometer and it was a great value! Further more, this was my first time ordering from this website and I must say I'm very happy! I ordered a bag of Florida crushed coral (40lbs), an aquarium background, an Instant Ocean hydrometer, and a bag of Instant Ocean salt mix (50 gallon) on 5-16-12 and received everything today on 5-19-12! It wasn't supposed to come for 7 days, so needless to say I'm very happy!
May 21, 2012