Is there any reason not to fertigate 3 times in 24hrs, once every 8 hours with 10/15% runoff. Currently I am running once every 12 hours. Once at lights on and then 12 hours later.
I’d lean more towards 3 or more than the 2 daily you’ve outlined..
It will take some time and adjusting to find what works but I would want more than just one feeding while lights are on if I had a system set up like this.. in fact, it makes sense to go ahead and do 4 or 5 if you are gonna step it up from 2 daily.
Sticking with 2 daily seems hardly more advantageous than manual watering once a day.