Help with EC, calmag

There schedule most likely does not include anything added from your water... RO should be low enough to ignore. EC does not convert to ppmvery well.. depending on the brand of your meter, it might give a reading that is 40% different.. So,make sure the "scale" matches what AN is publishing.. 500scale or 700scale etc.. check the manual of your probe... some even offer a switch between various conversion factors. Measuring this stuff is useful, but you can't use it in a top-down way... if you followed the same dosing instructions, you are following the schedule. Whether or not that results in a healthy plant is a different question. So, regardless, tweak until you find consistent health in the plant, then whatever that measures to is your target in the future. EC is important on its own.. regardless of the inaccurate conversion to nutrient concentration. Good to stay in safe ranges regardless as it impacts how the nutritional ions will enter the plant efficiently or if they are impeded in some way. i'd suggest looking into a app/program like hydrobuddy. These apps can calculate ppm per nutrient molecules and give you a cumulative total of all your products for much more accurate understanding of what is being fed, which leads to easier recognition and diagnosis of problems... pay attention to it and once you get it dialed in never worry about nutrtion again. fertilizing is one of the easiest things we do, especially if in a soilless/hydro context. Consistency is better than the mad scientist route adding this here or there... you may need slightly different formulas for different stages of life, but there's no need to waffle day to day or week to week without cause.