DO NOT SUBMERGE YOUR POTS UNDER WATER TO SOAK THEM. Are you serious? If you say you watered them very recently, and the soil is moist, there is no need to water them. If you have continuously watered them a bit early, the roots may be experiencing some difficulties. You don't want to soak them again, you may come into a root rot problem doing so. Allow them to dry out, watch them within the last hours of drying up, then water with plain water, or with something like molasses to feed the microbes. Your leaves look dark, and it appears they have plenty of nitrogen.