I love the shape of the nuggets. Really rocky like. As for the rust spots, I use to get them all the time. Since ur close to harvest and it doesnt look that serious, just add hald TBS of the epsom salt. I use to add full tbs but I had the rust spots bad. It weird that I dont really have that problem now. It stopped when i started adding less nutes. I use to feed almost every day now its every other and my ppms never exceed 500. Overall your girls look amazing. U shouldnt be too worried since ur close to harvest. I would add the epsom salt next watering. Then for the next water just plaon ol RO water. Then after that flush with full TBS of molasses. Your nugs are already good size so I wanna see how much they will swell with the molasses. When I flush I feed everyday with molasses for last week. I also use drip clean from H&G before I flush to get rid of any salt build up. Kinda clean everything out getting it ready for the molasses