Don't start over. Flush their soil with 2x the amount of VOLUME of the flowerpot, with plain water, such as R/O water, or tap water that sat out overnight with the lid off.
Do this every morning for a few days, and then start her on some ORGANIC bloom fertilizer (ex. 0-4-5, or 0-50-93, anything with low Nitrogen(N-P-K) to Phosphorus and (K)Potassium %'s.
Don't let the heat go above 85*F, or the stomata on the undersides of your leaves close and stop breathing, stunting growth.
Make sure you have SOME SORT of moving air, to push around Co2.
Also having a larger fan that puts some wind force on your plants will encourage more "Stiff Cellulose" growth, and make bulkier more tree-like plants.
You CAN save them!
Just be gentle in your adjustments. They need a few days to slowly adapt to anything. New ph/s, new lights, new heats, new humidities.
Love them and treat them like your girlfriend or little sister or mom for all I care.
They'll come out of it and make you smile!
Good luck soldier!
Oh and those indicas are looking great!