Leaves on my Girl Scout extreme from ilgm seedling are curling up and are really light green not quiet yellow but heading that way, 
Ec is .06 And ph was to high at 7+ but we’ve brought that back down to 6, are the curling leaves from the high ph or something else?? Also had a fairly cold snap over the weekend so could this be the cause ( grow room stayed at Around 10- 15 degrees Celsius ( not sure what that is in Fahrenheit) Any comments or advise appreciated emphasized text
maybe to much light for them right now
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Will raise the light and c how we go ,appreciated! Also drained the reservoir and and started fresh so fingers crossed!!
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% improvement today 
Before and after 