This is a glass fiber reinforced plastic tank designed for containing media to soften water. The tank is composed of an upper opening, a body, a discharge port, and a base. The upper opening and discharge port are typically connected with high-density plastic threads or high-strength flanges; the middle body is made by wrapping with reinforced glass fiber and high-performance epoxy resin; the base is generally made of glass fiber reinforced plastic or reinforced PP. Compared to traditional water treatment tanks on the market, it offers the following advantages: 1. Corrosion-resistant and leak-proof; 2. High strength and light weight; 3. Easy for transportation and installation; 4. Aesthetically pleasing.