Lockout is not much to worry about you can ramp up or down the dosage as you see how they respond.
I’ve yet to get those soils to last as long unless it’s a full auto on 24/7. And even then your plant will tell you when it needs more feed.
I’d make sure you monitor the ph and when you see some slow down in development it’s when you should start a feeding.
Just like your body; you don’t load up on food good luck winning the race without some really weak results.