My opinions bout BLT on number 2.
More About airpot and nutrient lockdown in number 3.
MASTER LEVEL FEEDING ADVICE:
I go with 1week between Feeds. First nuts 3 Times then feed number 4 only spring water and REPEAT until finished.
BEST NUTRIENTS ARE ADVANCED NUTRIENTS. They keep pH perfect all...
You should Water plants in a circle around The plant. Not straight on it. And Water in a circle until u see Water coming out The bottom. Then stop that second.
And My advice is to Have 1week between watering then check if Soil is dry upto few inches. and same when start giving nutrients