ah yeah, it most likely is the heat. I put the smaller ones in a different cabinet with CFLs and they are looking great. The bigger ladies still look great, just a little twisting. When I watered them I fed them only a tiny bit, and the ph was at 6.0 i believe. They're getting thirsty right now so I'll make sure it's 5.8 this time. And I ordered some fans from amazon because for some reason there are ZERO locally, just waiting for those to get here