Ya i have blumats and haven’t found a regimen i can put into reservoir without issue!
@JP1 uses green life biotics stuff too but he puts in reservoir but I don’t have stirring pump and in a gravity feed system the stuff that sits in lines between rez and carrots will make nasty slime in lines so need to find a good topdress regimen so can stick with plain water!
And i do have a soil ph probe that i use to check soil ph….when I don’t get too stoned to remember!