inside curling leaves?

Right I'm back on phone so been growing for years never had this problem I'm growing in biobizz soil (Always will)with all of the biobizz range humidity is 90 and temp is 25 so all perfect just one of my plants seems a lot dark green and has this curling issue I have a mars hydro 2000 and a 2000w led with Samsung leds so lighting is all good all others are booming and all is well dont get me wrong this one is booming just has this issue whats your thoughts?
 

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Right I'm back on phone so been growing for years never had this problem I'm growing in biobizz soil (Always will)with all of the biobizz range humidity is 90 and temp is 25 so all perfect just one of my plants seems a lot dark green and has this curling issue I have a mars hydro 2000 and a 2000w led with Samsung leds so lighting is all good all others are booming and all is well dont get me wrong this one is booming just has this issue whats your thoughts?
maybe a tad bit of over feeding or high ph try give it a mild flush with half strength and see how she roles
 
She getting the same as the rest thats what I cant get nothing different? Maybe just the genetics maybe?
if u aint had this prob before with the strain prob not nutes can flux from time to time so u may of put 3ml in but may of came in around 4-4.5
 
She alot darker than the rest also.... I'm not to worried just yet as they only young ill feed her different and give her a flush see what happens. This a new strain I trying gorilla glue skittles seem to be pulling there weight.
 
New lights to never seen nodes so tight im always trimming inside leaves to allow inside shoots to grow they powering through
 

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