Seachem Laboratories Glass Pollen Style CO2 Beetle Diffuser, Clear, 27 mm

If you are tending a planted aquarium, getting CO2 into the water cleanly is half the battle, and the Seachem Laboratories Glass Pollen Style CO2 Beetle Diffuser is built for exactly that. This is the clear 27 mm version, a single glass diffuser that connects to your CO2 injection system to disperse gas into the tank. It is designed to take CO2 from your line and spread it through the water column so your plants can put it to use.

• It connects directly to your existing CO2 injection system, so it slots into the setup you already run rather than asking you to rebuild it.
• The pollen style design disperses CO2 gas into the planted aquarium, breaking it down for distribution through the water.
• The large surface area of the 27 mm disc allows for the diffusion of large volumes of CO2 gas, giving you room to push more gas when your plants ask for it.
• That higher-volume capacity makes it an excellent choice for mid-sized aquaria, where a smaller disc can struggle to keep up.
• It is equally suited to higher-growth aquaria, the kind running demanding stem plants and carpets that drink CO2 quickly.
• The glass construction keeps the diffuser visually quiet, letting the focus stay on your plants and layout.
• This is the clear finish, so it reads as understated glass inside the tank.
• It ships as a single diffuser, one ready-to-install unit per pack.
• The 27 mm size gives you the broader disc when you have stepped up from a nano build into something with more footprint.
• It is a straightforward, dedicated tool for planted-tank keepers who want consistent CO2 delivery.

For the planted-tank hobbyist who has dialed in lighting and fertilizer and now wants CO2 handled with the same care, the 27 mm Beetle Diffuser is a clean, purpose-built piece of glass. Pair it with your CO2 line, settle it into your aquascape, and let the wide disc do the work of spreading gas where your plants need it. It is the kind of quiet upgrade that helps a mid-sized or high-growth planted tank look its best.