General hardness is the divalent metal cation content of the water. In most water this is comprised primarily of calcium and magnesium. Soft water has a low concentration of dissolved divalent cations, hard water a high concentration.
The native environment of some plants (Cryptocoryne, Aponogeton, etc.) is soft, whereas others (Sagittaria subulata, Riccia fluitans, etc.) are more acclimated to hard water. In order to replicate these environments it may be necessary to adjust hardness.
mineralize is a blend of divalent salts designed to restore or increase general hardness.
To raise mineral content/general hardness (GH) by 1 meq/L (2.8dH), use one inner capful (7 mL) for every 15 US gallons (56 L) when setting up an aquarium or when making water changes (add to new water). Thereafter, use once a week (or as needed). This dose raises GH by 1 meq/L (2.8 dGH). Target a lower general hardness for soft water, a higher value for hard water. Target a lower general hardness for soft water, a higher value for hard water.
Note: The aquavitro cap offers multiple dosing solutions depending on the size of your system. Each inner cap thread is approximately 2 mL. The inner cap contains 7 mL, while the outer ring contains 28 mL (35 mL when both are filled to the level of the inner cap.) When filled to the top, the cap contains 49 mL.