Help, not sure what is wrong?

Looks like calcium deficiency to me

 

If its RO water and ocean forest soil there should be no issues with PH or nutrients this early in the plants life. That leads me to believe its been over watered which has caused a deficiency. Your soil looks soaked, you should only be watering it when the pot is light as a feather. Its also stretching a lot and needs a lighting upgrade sooner rather than later.

 

Partially. Sometimes people who use RO water most often mis-judge how much CalMag to use.

Other factors that might cause a Ca deficiency is acidic soil, uneven watering, *overfeeding*, and simply the calcium being in an insoluble form either due to new organic material or incompatible fertilizer mixing

 

could be ammonium burns too. I hear sometimes OF soil can be hot. Make sure that your soil pH is at a good place (~6.3), and yea, lighten up on the wet soil. Might want to lower the RH some.

 

If you are using RO water, they say you should start out with the calmag before adding your base from what I have read and been told. But 2 ml of calmag in RO water should be 100 ppm in one gallon of water or 0.2 EC but others who use it all the time may chime in and help you out.

 

I think you meant..

lol everytime on this forum

 

For RO water, I always add 1.5mL calmag (or calnesium) per 4L during veg. I even add this when using Clonex solution.

 

start training her right away