Utility to help you with calculations related to DIY fertilizers for planted aquariums. Features: * Dose to reach target: How much fertilizer you need to add to tank to reach the target value (in ppm *) of a specific element * The result of a dose: How much of each element of the compound will be added to tank with a given dose. * Estimative Index: The same as (Dose to reach target) but the target is the value expected from E.I. Protocol * Estimative Index Daily: The same as (above) but for daily dosing * Estimative Index Weekly: The same as (above) but for weekly dosing * Perpetual Preservation System: The same as (Dose to reach target) but the target is the value expected from P.P.S. Protocol * Poor Man Dosing Drops: The same as (Dose to reach target) but the target is the value expected from P.M.D.D. Protocol