Well one time I replenished with straight cold water from the tap. About 3 hours later they all looked overly relaxed and droopy and the leaves were cupping. The water temp was like 54 F, I replaced with water that was 64 F and they straightened back up.infexion can you explain the water stuff more. I always dropped my water down that far since I knew it was going to creep up fast. I would like to know some science behind this if you know. This way I will adjust my next grow.