Well, the thing is that autoflowers can't grow with the lights on 24/7. Photoperiod only start to flower when the days get shorter, and there is less light. I say leave them at 12/12 until they are finished. If they are photos, and you add more light, they could stop flowering... But I'm not 100% sure about that. P.S. No mistake is stupid... Mistakes is how we all learn. I'll let someone else answer the nutrient question for you as I'm not sure since there's so many variables to take into consideration... And I'm a DWC grower. Good luck!I really don’t know