New Leaves Start Burning In Dsm

I have started a new tank setup with DSM method (I am within 4th week of this process). I am trying to grow Dwarf Baby Tears. I am using a low maintenance method that takes advantage of adding moist air into the tank from an external air pump. Air pump shoots air into a sealed bottle filled with water through an air stone. Ultimately the moist air is delivered to the tank. I am also adding CO2 (1 bubble per 5-10 seconds to boost the growth with extra co2 within tank). I provided an exhausting tube to prevent pressure build ups and also a very tiny fan (10 mm diameter) that allows more ventilation within tank (fan is on for 1 minutes every 30 minutes). I am using twinstar 900 36" for 12 hours and also turn on my ray2 finnex led fixture for 45 mins from 12 pm to 12:45 pm to imitate the sun light. ADA aquasoil plus three additives and aquasand are used for substrate. I don't mist the soil regularly as the moist air delivers the water to the soil and keeps the leaves moist. a week ago I added a little water by spraying and drained the excess water as a precaution to prevent mold. During the first two weeks of DSM the plants were growing very fast and I was really fascinated by their performance. Unfortunately, the plants started burning now. A very few roots started getting red and burn. Also, some new leaves are burning. I did not use any fertilizer on top of the plants neither dosed through the soil. Since I am using ADA aquasoil I believe it is reach in nutrient and I don't need to add anything. I also used aqua sand and three additives to the bottom of the tank. Aquasoil does not have some micro elements and potash I believe. I only added a very very very small amount of H2O2 (1 drop for 1500 ml of water) just to add oxygen to the tank. And I added the mixture to the sandy part of the tank which should not cause any oxidization of the roots and leaves.I am not sure what is the problem. Do I need to cut the light short to 10 hours? Do I need to flood the tank for a few days and add micro macro ferts and then drain and continue the DSM from there? I am afraid loosing all the plants that were growing fantastic. I still see growth here and there, but the new elongated branches of the plant do not develop new vertical roots to catch the soil and it is intimidating. A very few roots start becoming red which is not a good sign too. I have all required equipment available including the pressurized co2 and filter to flood the tank. What do you suggest? Any suggestion appreciated.

 

I will add pictures within next post: