Aquaforest. AF Mg Plus, 150 ml.
10 ml of Magnesium solution raises magnesium level by 7.5 mg/l (ppm) in 100 l (27 US gal) of water. Dosage should be established basing on water tests and daily corals consumption. Before applying Mg Plus it is recommended to test magnesium level in the water. We do not recommend raising magnesium levels by more than 50 ppm a day. Please ensure your magnesium level is within the recommended range before attempting to raise or adjust your calcium and alkalinity levels.