Originally Posted by NicoC16
I wanted to know if you had to purchase a certain hydrometer to test a certain salt's salinity. I have an instant ocean hydrometer but I'd like to use it in testing my red sea salt. Is this possible?
It is very highly recommended to get rid of the hydrometer . They are not accurate at all .
I have 3 different ones .
One coral life 1 Red Sea and one Instant ocean .
They all had different readings .
I bought a refractometer ,
They are very easy to read and accurate .
The best $21 I spent in a very long time