I do a slurry before I feed , ill do it on the outer edge not to bother the roots as much .. what im finding out is I mite have to do another slurry cause you will hit hot spots .. I like to do a preventive slurry , (don't like the oh shit now what ) thats just me ... hell I even ppm and ph my amendment soil before I use it ...I have the whole line and I kind of do my own thing with it but my baseline is greek ..we need a feed schedule that has Topd AAct in place of feeds
i have a confession i do not do slurry test as much as i should, its to hard for me (emotionally)to dig in my roots like that i only use 2 gal smart pots trust me i no the power of doing them but after like week 2 of flower my roots are so dense it takes a couple of min to drain and its not the HH ..