Mix your full reservoir full, larger volumes take longer to drift, a quality ph buffer solution will also ensure more stability I find Advanced nutrients has by far the best ph down/up (its noticeable).
Coco loco is to be treated like soil not like coco, just Incase you were unaware.
Avoid heavy plant training, do one fim at 4th/5th node and that’s it, unless you have a scog net and can let them stretch to grow into a screen like @Not2SureYet does so well. To much lst or to aggressive lst seems to work if your environment is really dialed in and your experienced but I would say you don’t need it considering me and @Not2SureYet don’t lst and have great yeilds.
How to FIM
Use the photone app, buy the sunlight option and learn to use DLI.