Bro I feel you on that. I have one girl absolutely beasting out. Easily twice the size of the others. Within about 18 hours of a 2 liters feed she is light as a feather. I'm not making special accommodations for her though, she gets fed every other day just like the other girls. I think that some of the soil does settle too lol. I pack my bags to the very top and by the end from watering in they definitely go down about an inch or two throughout the grow. Maybe it is... Dare I say... Magic! I think the soil is just getting really compacted but hey what do I know grow bro