I found the calculators available to be lacking somewhat and decided to make one. Ive tested it on one grow so far and and it has worked out well so I thought I would share. It’s for anyone using General Hydroponics Trio or the Lucas formula. Its particularly helpful if you are using RO with CaliMagic as well. It calculates ppm and ec while taking into account the CalMag. There is also room for incorporating beneficials into your nutrient solution. Enter your week#, amount of water, preferred measurement (gallons, liters, etc), and strength. Default for Trio is 100% and its based off of an updated GH Feeding Schedule: Aggressive. Strength can be adjusted while maintaining those ratios.
Any other questions feel free to ask.
OneDrive: File–>Save As–>Download a Copy