What are these spots on my leaves?

How long has this problem been going on? Every few days, this happened within 2 hours of checking.
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...) 10gl. DWC
What STRAIN are you growing? Pot of Gold – The Flying Dutchmen
What was the establishing technique? (Were the seed or clone?) Seed
What is the age of your plants? 2 weeks
How tall are the plants? 6”
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in? Vegetative
What Technique are you using? DWC
What substrate/medium are you using?(Hydroton, RockWool etc.) 3” netpots filled with hydroton, Rapid Rooters used to start seeds.
What is the Water temperature? 68 degrees, varies +-7 degrees, using 2 liter bottles to cool rez when needed.
What color are your roots? White? Brown? Are your roots slimy? White, no slime.
What Nutrient's are you using? How much of each if using multiple? GH FloraNova Bloom @ 1tsp per gallon, AN Vitaboost @ 1/2tsp per gallon, SuperThrive @ 1 drop per gallon; 7 gallon rez.
What is the TDS/EC/PPM you are using? 600 ppm
What is the pH of the "Tank"? 5.6 – 6.0
Are you sure your calibration is correct on your equiptment? Yes
When was your last watering?
What is your water temps? 68 +- 7 degrees
When was your last feeding change? (ie. grow-bloom-micro-additional) Changed rez water yesterday.
How often do you clean your system: example: Flush out water replace with clean water and nutrients? Once a week.
What size bulb are you using? 1000W HPS
What is the distance to the canopy? 24”
What is your RH Factor(Relative Humidity)? 42 – stable.
What is the canopy temperature? 75 degrees.
What is the Day/Night Temp? (Include flucutaion range)85 day – 70 night.
What is the current Air Flow? (cfm etc.) 400 cfm
Is the fan blowing directly at plants? Yes.
Is your water HARD or SOFT? Hard. 290ppm.
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water? Tap.
Has plant been recently pruned, cloned off of or pinched? No.
Have any pest chemicals been used? If so, What and When? No.
Are plant's infected with pest's? No.


As you can see in the pictures there are light colored spots...they look like water spots, but I assure you they are not. I went out 2 hours ago and drop in a 2ltr bottle of ice to cool the rez, inspected the plants etc. I went back out to remove the bottle and I notice these spots on this plant. So far none of the other plants have anything like them yet. Any ideas?

not seeing any pics

Had a problem uploading...there now.

is that only on the top of the leaf ? i cant see them that well but looks like something dried on the leaf or slug slime kinda.
try for a close up maybe so we can get a better look and describe whether its on top or all the way thru.
the rest of the plant looks real healthy otherwise

It's on both sides, the little spots have dried up and are yellow now. It's weird for sure.

If drops of water got on the leaves they can act like a magnifying glass and burn stuff. Everything looks real good tho. This website helped me alot. Cannabis Nutrient Disorders
Good luck.

i also have little holes threw the leaves

i have a 4in plant that has white spotsi also have little holes threw the leaves also my top leaves are getting really big compared to the bottom leaves. should i cut them down.?