Oh, you're lights are on 24/24.
I was thinking 12/12.
Yep, that is about right.
When you change to 12/12 you dont feed at lights off.
If you like, you could cut it down to 18/6 now, giving the plants a bit of rest for the 6 hours a day before you switch to 12/12. You could also feed every 3 hours (7 times a day), ie. lights on at 6am: feed at 6am, 9am, 12pm, 3pm, 6pm, 9pm and 10.30pm leaving 1.5 hours before lights out at 12am again. You could feed every 2.5 hours if you like, make sure to leave 1.5 to 2 hour before lights out. Nutrients left in your medium over lights out could rot your roots.