jack keep a close eye on your ph. It may well be rising in response to the stress of the heat or something. It is important to keep where the plants are down to the 5.8-6.0 level....along there. I just lost some brand new seedlings I put in my setup and feel I could have changed that if I had paid more attention to my ph's quick rising. It can be sign of tissue destruction....burn....etc...

Seedlings are frigging wimps at that age.
Weedhound Reviewed by Weedhound on . First time grow KC Brains Skunk #1 & White KC Hi All This is my first grow seems to be going alright. I did also have some NL during germination & propogation but they all failled to make it to seedlings. WIll have to do a dedicated NL grow with the rest of my seeds as I reckon I know where I made mistakes. These seedlings are about two weeks old and as I say it seems to be going ok but a couple have started to droop a bit since being put in the larger rockwool cubes & te NFT tank. They are under a 250W MH bulb by Solarburst Rating: 5