I have a aquarium systems seatest swing arm that is measuring my salinity at 1.024, and my coralife deep six measuring it at 1.020, which one should I go by?
which one should you go by ?
Neither.
Without a third device - you can't be certain.
One of them is wrong
or
Both of them are wrong
I'd have them compared to either a glass hydrometer or better yet a refractometer - and find out.
