hey I have/had as it is passing the exact same problem. See pics

I dont know 100% why it happened but. I had mine under a t 400W MH and It was too hot. So i first moved it under some T5's. the plants were still getting worse but at a much slower rate.

I think decided to transplant the seedlings into new soil. I had them in Black gold organic potting soil. It was a little bit too strong. So now I have them in a mix to peat moss, sand and Perlite. They are doing great now.

I would suggest using that mix, its just the cheapest potting mix they have and its great for seedlings as it has such good drainage.
harris7 Reviewed by harris7 on . help with seedings hey people really need your help my babies are just over a week from poping and leaves going brown asif there burnt i germinated in canna coco soil not using any nutes yet ph is around the 6 mark temps 78/84 i thought it was the light too close so i lifted it a inch or 2 the light im using is a 110w starlight with canopy i found the problem last night and they was realy dry so i watered could being to dry cause this ? Rating: 5