Mother plant problems.

I recently got 4 mothers from a friend who is moving. they are about 24 to 28 inches tall 1 is about 30ish. They are in 1 and a half gallon pots with bcuzz coco. they are under a 400 horti blue MH in a cooltube with a 6 inch inline fan pulling air through the light to cool. it is on run to waste and i feed 4L daily. they were being fed house and garden. i started with half strength of the advance and 3 are perfect. no burn nothing. they are being fed advance noots sensi grow a and b along with b52. they are great looking. the temp can get up to 82 in the tent at the hottest and about 73 when the light is off. they are on 18 on 6 off. i hit the one wilting with some revive folier feeding it before the light went off. anyone know whats up. i also have 2 8 inch clip fans to move air around. she is wilting pretty bad and i wanna get her up. she had clones taken about 2 weeks ago and was fine 2 days ago. thanks:?
 
should i cut back a few days and see what happens? the guy i got them from was watering everyday in the morning. he was on a open line drip system though that ran for 5 mins
 
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