My clone are a little droopy and a couple have the edges ever so slightly rolled up,just put these in 6x6 rock wool cubes,under a 1000w thats several feet away/air cooled,and my humidity only seems to stay about 20 % in the day...any ideas? thanks

Do these clones have roots yet or not? How big are they? Do you have pics?

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L.O.W. T.H.C. starts with an imbalance in one of these;
Light Oxygen Water Temperature Humidity Co2 My Youtube grows

Id say the humidity is low. Id sat they are losing too much water. perhaps a humidity dome or mist a few times a day.

Oh and the 1000w is overkill for clones. a few clfs on 24/0 would suffice.

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Are you giving nutes? Do they have roots yet? Leaves curling under is a sign of too much nutrients.

But the 1kw light is fine as long as you have it that far away, provided the temp is ok in there.

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there about 5 in tall ,in a ebb and flow,lamp is about 4 ft from,yes they have rooted into the 6x6 cube,and some have a few rust spots,iam using a dark room.

temp stays around 73-76

using flora nova @ 300 ppm