Which would you believe?

[simplycoral]

Originally Posted by whatcaneyedo

I've compared several hydrometers with my refractometer and I've seen some that were out as much as 0.006.

I also use a sample of known salinity to calibrate my refractometer yearly http://www.jlaquatics.com/product/pp...+Solution.html so I feed confident that I'm getting accurate results.

Hi,

Definitely the way to go! I will order some now, before i go reducing the levels! Thanks..

S