Yellow tipped top growth

Hello, Normally, the yellow tips indicates that there are too much salt in a soil (in case you are growing in soil). Check the PH of your drain (run-out) water - it shouldn't be below 5.5. (Ideal is 6-7) Based on you results, if the PH is low, and EC is much higher (20% higher) then your fertilized solution, I would suggest to make some flash to your soil in order to remove salt from. In addition, probably you should water her more or more frequent- but you drainage system should work properly!!! Normally this phenomenon is not critical if the situation does not become worse.

It's being fed at just about 800ppms. They're in DWC, so there's no runoff. I've also cut the nitrogen way back and am on bloom nutes. Floragro is only around 4mL/gal. Floramicro is at about 5mL/gal. Florabloom is about 10mL/gal. I also use diamond nectar, armor si, and hydroguard.

And why your buds aren't fattening.. Have you checked your Ec coming out?

I think Iv'e said you have overfed before.. That's my opinion that's why your seeing yellow.. It's from too much not from too little.