General Hardness information added to the Water Chemistry page!
dGH – degrees of General Hardness
dGH is a measure of concentration of magnesium and calcium cations (Ca2+, Mg2+) in solution.
Shrimp can generally tolerate a wide range of dGH, and so in my opinion action should only be taken if the dGH value is dramatically different to the dGH of the shrimp’s natural environment. Some particularly sensitive species of shrimp may require some manipulation of dGH.