Potomac Hydroponics is helping the 4-State area reach its maximum potential for Indoor/Outdoor growing by providing top quality products that we can recommend with no hesitation or concern for ANY style of growing. Potomac Hydro has over 23 years of outdoor Veggie growing and 13 years of indoor veggie growing with all styles of media and multiple nutrient brands. I have had more "trial and error" projects then i care to remember. Jon-Paul