Couple of problems Need Help! White Spots, Purple Tips

I have 2 problems that I need RIU help with.

Problem 1: I am not sure why but there are White Spots on some of the leaves (Usually the smaller leaves). I've had this problem since I got the cuts (About 4 weeks ago).














Problem 2: Purple/Dark color on tips of almost all the leaves. (Is this a strain thing as in turning purple?) Because my other purple pheno didnt turn purple until 7th week of flower.













Also I believe the twisting leaves are because of the strain so that doesnt really matter. (Purple Erkle/PK)


Details:
Strain: Purple Kush

Medium: ProMix BX with dolomite lime.

Watering at 5.9 pH R/O w/Superthrive (Watering this low PH due to the fact the soil is around 6.5 (I think because of the added dolomite lime), it evens out to a runoff of about 6.2.

Was Feeding them Lucas at 1/3 str every watering w/super thrive. (350 PPM)
Now feeding them at Lucas Full str (820 PPM) with superthrive (Every 3 waterings) Faster growth this way.


Runoff:
6.21 pH
960 PPM (Using Full Strength Lucas Formula for Veg) (Ive only started feeding this a couple days ago and they love it (Noticed very very fast growth).
Was previously feeding them 1/3 str lucas.


Ive checked for bugs with a 40x scope for a couple of hours, found none.


Anyone help me?

quite commonly, 'the twist' is the start of a P deficiency as would venture a guess also the culprit of your purpling leaf egdes. now with that amount of ppms, which I believe is high, there has to be something else going on. there is an imbalance somewhere.

smokeybandit22 said:

quite commonly, 'the twist' is the start of a P deficiency as would venture a guess also the culprit of your purpling leaf egdes. now with that amount of ppms, which I believe is high, there has to be something else going on. there is an imbalance somewhere.

Click to expand...

This problem occured before I started feeding them at full strength.

Runoff from my usual 1/3 str feeding was 350 PPM, is that too high as well?

Any light on the white spotting? it occurs only on some of the plants. The purpling is occuring on all the plants.