Seachem Laboratories - Aqua Vitro Reef Ions. If youve determined your magnesium levels are low, supplementation with ions is necessary. ions restores magnesium by employing the most concentrated, fully dissolved magnesium and does so without adding any ammonia. Other liquid magnesium supplements inherently contain ammonia because the magnesium chloride used in their production contains ammonia. This is a result of the mechanisms for deriving and/or producing magnesium chloride. aquavitro has gone to considerable lengths to remove this contaminant and a proprietary process makes ions