1st Grow: Dark Devil Auto by Sweet Seeds

Let's see, pH is ok, temperatures are ok, humidity is ok too. I'm of two minds, first I think you are over watering, 0,2 gal of water per day is too much at this point, let the plant hunt for water in order to develop a strong root system, also no information on feeding strength so I'm gonna say you might probably be over feeding or having some kind of nutrient lockout. At this point you should be giving something like 0.4 EC to 0.5 EC (200 PPM to 250 PPM), mostly cal-mag. You have quite the cocktail in your feeds and if you are going to use soil less media, an EC / PPM meter is a must.