Multi-Bed Filter (GASS Filter) Green Caps GASS filter GASS filter consists of multiple natural minerals on earth filled into a strong, durable and recyclable housing. It comes with Green colour caps to describe the Green Technology of our product. Advantages: -Pre-filtration of sediments, -Reduces rust, flocculation, fine organics & suspended solids down to 5 micron -Clarify Turbidity in the water -No mud ball forming, no filtration blockage -Hassle free cleaning or backwashing -Extend filter life cycle Authentic Original cartridge replacement for Outdoor Water Filter Alva Fontus 2 / Blondal M2 / EVO2 Price is for Single 1pcs cartridge (GASS Green) only. More info Call 01234 64564