lol you were right, one of my seedlings has a yellow mark around the edge. its the 1 in the soil. i guess its just burning so ive raised to 18-19 inches like you said lol. the 1 in the rockwool is growing well but 1 of the big leaves is pointing up and the other is pointing down, ha. is this a prob? ill sort some pics tnite but my camera isnt gd and for some reason wont take any coloured picture under my hps except for yellow 1`s.