3 symptoms w/ pictures. What could cause this? Led grow

Just transplanted this, It is maybe 2 months in veg. I use only bottled spring water, or dasani bottled water. I used a soiltab from nirvana, but other then that no fert or chemicals at all. It is in a mix of fox farm ocean/perlite/with just a sprinkle of miracle grow seed starter. To me is seemed like a calcium def, so i purchased some worm poop spray + calcium. and only squirted a few squirts onto the topsoil. But, the tips are now curling and the leaves are sort of brittle feeling. They are under a led, so heat is just in the low 80's. Humidity seems to be the the 40%. Any ideas?


And here is that worm poop I squirted on them. Seems pretty tame. ( also used a little superthrive when I transplanted )(in hopes of reducing shock )