Still can't diagnose plant, advice please (Auto Purple)

I'm growing an auto purple by pyramid seeds. It's right at 30 days now. I started it under the aero garden cfl lights and on 24/0 light cycle. I just switched it to my 600w hps light yesterday on 20/4 light cycle. I fed it just plain spring water for the first 10 days. Then did a 1/4 strength feeding of the fox farm hydroponic trio pack. Yesterday was its 3rd feeding, I went full strength with the nutes, 3 tsp big bloom, 2 tsp grow big and 1 tsp tiger bloom.

It seems to be growing good, I just noticed that these strange spots have started to appear on a few leaves over the last 2 weeks. I tried identifying the spots but I can't find any pics that match mine. There's no brown or anything, it's like if someone just scratched off the green on the leaves. I'm not sure if I'm over feeding or under feeding it

This is a stealth grow, so I know my 600w hps is overkill for this small little spot but it's either that or my aero garden light. I have an a/c unit pumping 67 degree air into the space and a fan on constant low speed pointing up at the light. The light and fan are both running on 20/4, so once they both switch off...the a/c is still running and the temp in the little space drops to 67 degrees for the 4 hour dark cycle. This strains buds are suppose to turn purple and I heard by dropping the temps during the dark cycle can bring out the purple.

Here's some pics, there's one with the hps light on so you can see the space, the other pics have the aero garden cfl's on to take the pics.

I'll wait to hopefully hear from some of you guys. Thanks in advance!

Are those your real boobies?

pH? EC or ppm? need more info

i have an aquarium ph test kit, I just tested the reservoir,...it looks like 6.8-7 according to the color chart. Is this aquarium ph down safe to use for my plant? I should lower to 5.5-5.8 correct?
I don't have a ppm meter and I'm broke or I would go out and buy one. I do have an EC meter, it's hard to read because the batteries almost dead, but it looks like it says 174 x10

yeah, definitely get that pH down to around 5.8 i would think the aquarium stuff is safe but don't quote me on that. doesn't kill fish should not kill plants.

EC meter is better than ppm in my opinion. so your EC is 1.7 then? if so, i think that is too high. and that was full strength nutes? try running half strength and see what your EC is. i'd go for around 0.8 or 1.0 i never went higher than 1.2 even during full flower.

Take my advice with a grain of salt but I have auto purple I'm growing although mine is much younger than yours I am noticing that they r very sensitive to nutrients