OK,
How are you measuring your soil's pH? If it is one of those things that costs under 100$$, then don't bother using it. If it is the one with the soil moisture sensor on it, you can use it for that. It is good at moisture sensing.
Your potting mix came with fertilizer pre-charged inside. I would discontinue use of the miracle grow fertilizer immediately.
What is your source water? Well, city, spring, rain, reverse osmosis, bottled?
I If they are in one gallon, run 4 gallons of clean water through. Get it? 4 times the water will flush out any crap and will get you back on track. After watering so much, the plants will not need to be watered for quite a while. It could be a week. Let them soak it up at thei pace.
Also, forget the natural sun. Keep the T5s close to the plants -- maybe two inches. If they look weak, you could back off the light a bit.
This should get you stabilized.
You could reconsider Miracle grow at a later time. there are cheap easy powders that are better for MJ.
Tommy