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Reef Chemistry Question of the Day #46
What is general hardness (GH)?
A. A measure of alkalinity
B. A measure of calcium only
C. A measure of magnesium only
D. A measure of calcium plus magnesium
E. A measure of alkalinity plus calcium
F. None of the above
What is general hardness (GH)?
A. A measure of alkalinity
B. A measure of calcium only
C. A measure of magnesium only
D. A measure of calcium plus magnesium
E. A measure of alkalinity plus calcium
F. None of the above