looks like your drowning them, yellowing leaves is normal during flower, but the second pic is either nute burn or light burn. Looks like humidity is too high as well, given the wrinkled and folded leaves. Do you let the container completely dry out before watering, if not that your problem.
2nd pic, if that leaf is at the bottom, its either nute burn or the plant doesnt need that fan leaf anymore. Top light burn 100%
I either nute 1/4 - 1/2 strength everytime, or 75% once a week. Any more than that, is asking for trouble