I started indoor growing back in 1992 and I've tried way too many brands to even remember... For almost 8 years I grew in rockwool using only Canna, as well as a few additives, but like many growers I struggled with P.H balance, EC Levels.
I had all the tools you could get, P.H & EC pens for testing and PH up & down additives to keep things perfect. When I look back now I can't believe what was involved in having the perfect harvest...and I was getting bumper crops! I shut down for a couple of years, mainly due to bad luck with crappy strains and other circumstances. When I Started back up, for some reason tried Advanced Nutrients (Sensi grow & Sensi Bloom) and have never looked back. Their nutrients have never failed me and I've never had to test for P.H levels, EC level on any harvest, nothing! I just mix and feed... There is no leaf burn, no yellowing, no leaf curl, not one single issue other than rapid growth & huge buds. The price of Advanced Nutrients are insane here in OZ, but I'll never even try anything else ever again.
After 30+ years of trial & error, I now only grow using clones in coco with Advanced Nutrients. I also only use SOG method with perpetual harvesting.