MasterLine Iron is a iron (Fe) based solution. MasterLine Iron enables separate control of the nutrients with daily or weekly dosing.MasterLine Iron+ fertilizer for ornamental aquarium plants, based on iron+ does not react with phosphates in the aquarium+ adjusts iron deficiency and helps with better pigments+ together with the individual elements of MasterLine, it offers supreme control over nutrient concentrations+ can be dosed as a supplement to complete fertilizing formulas+ compatible with all forms of aquatic life, including shrimp+ suitable for daily or weekly dosage+ element with a high degree of stability (chelated with DTPA)+ contains a graduated measuring cup from 2.5 to 20 mlDosage MasterLine IronAdd when necessary, depending on the preferred values 1 ml to 30 liters adds 0.1 ppm Fe to the aqaurium water.