Seachem Beetle Diffuser 30 mm

• For aquariums 75-190 L (20-50 US gallons).
• Preferred pollen-style diffuser for large aquaria or high-growth aquaria.
• Large surface area of diffuser disc ideal for high volumes of CO₂ gas.

The 30 mm glass Beetle Diffuser is a pollen style CO₂ diffuser that connects to CO₂ injection systems to easily disperse CO₂ gas into the planted aquarium. The large surface area of the 30 mm disc allows for the diffusion of large volumes of CO₂ gas, making the 30 mm Beetle Diffuser an excellent choice for larger aquaria or high-growth aquaria.

Compatible with 6mm (1/4″) – Standard Airline Tubing. Suction cups included.

Compatibility

What it is. Seachem’s own description: a pollen-style CO2 diffuser that connects to a CO2 injection system to disperse gas into a planted aquarium, with a large disc surface area built for high CO2 volumes.

Where this sits in the Seachem range. The larger of Seachem’s two Beetle Diffuser sizes. Seachem calls the 30 mm disc its preferred pollen-style diffuser for large aquaria or high-growth planted tanks, one step up from the 27 mm Beetle Diffuser.

Specifications

Disc size. 30 mm, per Seachem.

Recommended tank size. Seachem states this diffuser suits aquariums of 75 to 190 L (20 to 50 US gallons).

Tubing. Compatible with 6 mm (1/4″) standard airline tubing. Suction cup included.

Setup & Use

Fitting tubing. Rinse the glassware with warm water, then attach the suction cup and tubing to the diffuser.

Mounting. Position the diffuser low in the aquarium using the suction cup, and mount a check valve inline with the tubing outside the tank before turning on the CO2 and adjusting to the desired flow rate.

Removing it safely. Don’t pull tubing off the glassware. Cut it carefully along the attachment length instead, to avoid breakage.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number, or email us if you would rather, and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 48 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.