check out this seedling. 24 days old @ picture. sprouted with mandala's rockwool technique. only thing i can think of is that its gotten really hot around here lately. looks like it self-topped. after seedling came up, went into dwc bubbler with 5.8ph plain RO. the RW was soaked in 5.5ph RO to stabilize. i'll keep her going for a while to see what happens. any thoughts?