Your probably good for a another half gallon in another three days.
They will probably be big enough by next weekend to water until run off out the bottom of that fabric pot. Then you can check your run off PH and PPM level.
I’m in three gallon pots and water with 1 gallon to runoff every 5 to 6 days. Your 5 gallon pot will probably take 1 to 1 1/2 gallons to get runoff.
A few have gone to 14/10 on the lights. I’m on a 16/8 light schedule.