Hello, im a first time grower and my babies are about 5 weeks into veg state. about a week ago I noticed some of the more under-developed plants' fan leaves were yellowing with some crispy brown parts.. started near the middle of the plant, and its working its way up and down slighty. Ive been watering them well, giving nutrients and guano tea. Could anyone give me some kind of diagnosis for these? any suggestions would be HUGELY appreciated. Also, one of them has clawing top leaves, dont know what to think