the staining is probably from the humic acid in the Zeus Juice. What i can see is a slight N excess, just cut that down a bit keep everything else level and the symptoms (slow growth, too green, shiny leafs, downward curl) should recede . by the way, root pruning is a thing : just clip your roots off a bit (never more than 20% at a time) and you'll notice an immediate growth spurt. Hope this helps ! 🚀