Leaf issues from week 1

My plants are 13 days old growing in a DWC system. One of the lower leaves has 2 yellow spots on it. PH is at 6 and i drained 2 gallons of water out yesterday and added 2 gallons of fresh water. They still have have some nutrients and amimo acid left over from the week 1 feeding.Should i be concerned

@Nick211

Please fill out a support ticket to make sure we don’t overlook something

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, ILGM… name of strain:

How many plants:

Age from Sprout and Flower:

Soil in pots, Hydroponic, or Coco / Brand and type of Soil & Size of Pots:

How often do you water and how do you determine when to do so?

PH of water and runoff or solution in reservoir:

What is strength of nutrient mix? EC, or TDS:

Indoor or Outdoor:

Light system, size and height from plants:

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

Also here is a Deficiencies & Excesses Chart to help you identify what is wrong with your plants

Nutrient_Chart2