White/Yellow spots?

So this is my first grow of T.H. Feminized Burmese Kush and everything was going great up until I noticed these spots. In the worst of the two plants that are experiencing this problem there are browning of the edges of the leaf. Also, the entire plants aren't having this problem just certain leaves??

I am running a hydro/bubble system with a 200 watt CFL bulb
I am currently using the vegitative formula provided by technaflora
I have a ppm of about 1100 and a Ph level of 6.0 (ish)

Here are the pictures:

could be from a drop, they look good

whats your pH and are they getting enough Ca?

hexthat said:

could be from a drop, they look good

whats your pH and are they getting enough Ca?

Click to expand...

The pH hangs around 6.0 but it's not as stable as I would like it to be.
I have to correct the pH about once daily.

They should be getting a sufficient amount of calcium. I could add about 5 ml of a calcium based nutrient solution to the 3 gallon tank, although I don't want to give them too much of one nutrient.

probably the pH are you using a veg nuts and having to pH down? cause GH pH down is P and when your plants are in veg they eat that shit cause veg nuts usually are low in P and after they eat it they eat the GH pH down.... darghghghghg did i say that right i smoked some hash