Please give soil brand.
Bottled water= drinking or distilled? Either way, switch to tap water.
You REALLY need to know your temperature.
Also, you need to have a proper exhaust for your room that removes hot air, and a passive intake near the floor that allows cool fresh air to replace it.
Why are there plastic cups sunk into the dirt in the pots?

Looks like some combination of overfertilization, overwatering, and overheating.