GrowoniX Ultraviolet Filtration for EX100-GX400This ultraviolet filtration system by GrowoniX is designed to use powerful UV light to destroy 99% of harmful micro organisms in your water supply. The best part is that there is no need to add chemicals or other disinfection by products to get clean water. You can use it to treat your city or well water. This UV filter is designed for EX100 GX400. 100% Safe and Powerful Filtration: This UV filter is the most effective way to remove viruses, cysts,