For use in medium sized to large aquariums, Pollen Glass Large Series is available in 20mm and 30mm, to suit your aquarium’s CO2 needs. Pollen Glass LARGE Series are also recommended for aquarium using many aquatic plants like Riccia fluitans, which requires a large CO2 supply for its growth. Its U-shape glass tube is unobtrusive and eliminates clogging of gas. Handmade, all-glass distributors, designed for long-term use.
This is the Pollen Glass with a wider diffusion filter, which is placed on the side panel of aquarium. Its unique J-shape glass pipe design sits elegantly inside the aquarium tank. 20Ø is designed for 60cm tank with fully grown sun plants, such as Riccia that requires much CO2 and 30Ø diffuses CO2 effectively for 75-90cm tank. Pollen Glass Large is made by glass including J-shape parts, therefore please pay attention for handling when attaching or detaching suction cup.