Noticed some curling at the base of the first set of adults. Thinking its a combination of overwatering and too intense a light. The blumats require a thoroughly wet substrate before installing and this may have as a result waterlogged the poor bugger. Im thinking it's less likely the light which is at 24" giving around 270 PPFD for the seedling (as per manufacturers ratings). Will leave it for abit and see what happens.
Anyone with any ideas?