Root diseases, such as Pythium, can destroy a growers' crop very quickly, especially in a hydroponics system that uses a shared reservoir. We stock a range of products that will help to eliminate root diseases but they are all best used as a preventative, to make sure it never takes hold to start with. In soil, always allow the medium to dry out a little in-between waterings. In hydroponics, always keep your system scrupulously clean, keep your reservoir water below 21C (70F), and use a product such as Regen-a-Root to keep root diseases at bay.