Been growing these plants for awhile now about 4 weeks veg and prob 5 weeks ish flower . I'm using coco coir and mega crop with one of their bloom boosters. A couple plants started going a weird yellow brown ish color and I can't seem to figure out what it could be. I don't think it's light burn. I've been feeding 4 tsp per 5 gallons for about 3 weeks so I don't think it's nute burn. Recently i started using the booster so possibly that but I'm only using a half a tsp per 5 gallons and they recommend about a 1/4tsp per gallon so I don't think it's that.. I don't see any bugs or anything either. It's only on a 2 of the 7 plants started on top and working it's way down it appears.