I agree completely, its a bit over the top for most of us. I did buy one of the sap PH meters, they are about $150 now and I check brix every week or more and I do see the relationship. You can have perfect sap PH but low brix, but you cant have high brix and deficiencies or toxicity in the feed mix. For me in hydro the brix is key to get that terp production up there and I have the Tinmans green thumb