Also: DWC is an acceptable method for growing serranos if you want big, lush, green plants. However, just like nutrient stress, chiles like a little drought stress to produce good fruits. There is some balance to be maintained between yield and heat/quality - take a look at the Chile Pepper Institute, they have an article on the topic. If you are happy with your DWC results let me know and maybe I will give it a shot! If not, look at other methods such as ebb and flow or top watering. Either can be done pretty easily and give you more control over feeding schedule.