VIV produce a wide range of glass accessories for the aquarium, made from high quality, laboratory grade glass, with gives maximum strength, durability and visual clarity. The hand crafted glassware is designed to achieve the perfect blend of art and function that are highly transparent and almost invisible in the water. Ideal for giving a professional look to any planted aquarium. CO2 Counter & Diffuse is an integrated CO2 supply system that combines a bubble counter and a diffuser. The unobtrusive glass diffuser diffuses CO2 water efficiently. Designed for 60cm tanks or smaller.