Hey guys , Sorry I'm late to the party . By the pics you posted a few hours ago it could also be soil to wet . Do you stick your finger in your pro mix an inch or so before watering ? I only say that because my leaves were perfectly healthy till today I havnt fed since I flushed 3 days ago and today showed signs of leaf tip burn as well. P.S I enjoyed reading the journal and will be one along for the ride wishing it would go faster