Overdose of nutris?

Raise ph to 5.8. Your a little low. Your nutrition amount is a lot high to. Spots on leaves could be from being wet and light is magnified by water causing burn spots. Never go off bottle strength it is not for cannabis. A quarter to half strength will do you much better. Good luck and happy growing

Baby plants need baby feeding. Stick with half strength. 18/6 is also much more plant friendly, they need sleep and 4 hours is just not enough in my opinion. 18/6 is pretty well the most effective routine and the healthiest one too. I have found it is far better for your plants to receive a gentle and constant supply of weaker nutrients more often, rather than strong doses less often, which can cause nutrient spikes. For example, if the nutrients say to dose them every 7 days with full strength, I would suggest half strength every 5 days is more effective. This way your plant gets a gentle wave of nutrients, not a tsunami all at once. They will grow just as fast and without the risk factor of getting burnt. Remember too, it is very easy to correct a slight under feeding, but very, very hard to rescue a badly burnt and overfed plant. Hope this helps, Organoman.

Your pH is to low. Get it to 6.2 and it should be fine. Also you shouldn't feed so heavily. Stay with 1/4 to 1/2 the recommended dose