I Have some 30 day old Gold Leaf plants that are showing spots that I can’t ID.
They are under MH 150W, 24 hours and are about 8" away in home made hydro system.
They are watered 2 times a day for 15 minutes each with FoxFarm Big Grow (6-4-4).
These spots just showed up in the last 2 days. They are a gray color and the edges of some of the leaves are curling.
I don’t think the Big Grow is the issue but I can stop that and use tap water if someone thinks that might be have a negative impact on them.
We’re going to need a support ticket filled out. Also I will put a couple of charts after that.
COPY/PASTE: This “Support Ticket” into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA
Strain; Type, Bag seed, or NA
Soil in pots, Hydroponic, or Coco?
System type?
PH of runoff or solution in reservoir?
What is strength of nutrient mix? EC, or TDS
Indoor or Outdoor
Light system, size?
Temps; Day, Night
Humidity; Day, Night
Ventilation system; Yes, No, Size
AC, Humidifier, De-humidifier,
Co2; Yes, No
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you.
Strain; Type, Gold Leaf seed
Soil in pots, Hydroponic
System type? Home Made Hydro
PH of runoff or solution in reservoir? N/A
What is strength of nutrient mix? Foxfarm Big Grow (6-4-4)
Indoor
Light system, size? 1 150W MH, on 24 Hours
Temps; Day 88, Night 75
Humidity; Day N/A, Night N/A
Ventilation system; Yes, Size 640 CFM
AC, with De-humidifier,
Co2; Yes
Watering every 12 hours for 15 minutes each
You need a pH test kit or meter asap along with pH up and down.
pH of 5.8 for hydro. Improper pH will present all sorts of troubles due to locking out nutrients!
Depending on where you’re located on where you can get them. Local hydro store should have that or o can give you links to Amazon?
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As @bob31 PH is super important specially with hydro growing…
Also might want to give them some rest atleast 20/4 if not 18/6…
The curling to me looks like heat stress 88 by day is very warm for the girls… 75 you want to be aiming for… of you cant get below 85s then might i suggest adding some Co2 but whatever means you choose that will allow the plants to better operate at them temps 
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