Dutch science nutrients good or bad???

.... Has anyone ever used Dutch science nutrients humates before??? Apparently it's the best stuff around according to their website .... I've been finding my pH levels are at around 8.5 which seems ridiculous when I'm adding the nutrients and using root farm ph to bring it back down to around 6 ... Is this normal for the ph to be so high with the nutrients...

I mix it with botanicare pbp bloom. Ph is always at 6-6.25 when mixed but my first try maybe I do it wrong but they dont burn for now and they still grow bigger buds. Note that im only starting week 4.. day they are outside and night inside with fan, humidity at 55 and 20C totally in dark. Trying to learn