wuts up, from some of the burns looks like it might be nutrient burn. transplantings not a bad idea if its been in there for a while but 7 gallon pot sounds like plenty of room. i would just lay off the ferts and flush if it gets worse transplant. dont flush everyday though just lots of water on its normal watering days. also they sell a 3 in 1 ph light and moistness tester in lowes for 8 bucks. takes the guess out of under/over watering