Seachem Glass Slanted Diffuser 15 mm

• For aquariums up to 75 L (20 US gallons).
• Low profile design excellent for minimizing the visibility of the diffuser.
• Simple and easy to use.

The Slanted Diffuser is a pollen style CO₂ diffuser that connects to CO₂ injection systems to easily and uniquely disperse CO₂ gas into the planted aquarium. The elegant and low profile design of the slanted diffuser makes it ideal to minimize the visibility and intrusiveness of the CO₂ injection system on planted tanks. The Slanted Diffuser has a 15 mm disc.

Compatible with 6 mm (1/4″) – Standard Airline Tubing. Suction cup 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 low-profile design meant to minimize how visible and intrusive the diffuser is in the tank.

Where this sits in the Seachem range. The smallest and most discreet of Seachem’s pollen-style diffusers — the Beetle Diffusers (27 mm, 30 mm) and the Spiral Bubble Counting Diffuser use larger discs for higher CO2 volumes, where the Slanted Diffuser prioritizes a low profile over throughput.

Specifications

Disc size. 15 mm, per Seachem.

Recommended tank size. Seachem states this diffuser suits aquariums up to 75 L (20 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 wet the inside of the tubing with water (not other lubricants) before sliding it over the glass attachment point.

Mounting. Attach the suction cup and position the diffuser low in the aquarium. Seachem recommends a check valve inline with the tubing outside the tank, then turning on the CO2 and adjusting the flow rate as needed.

Removing it safely. To avoid breakage, don’t pull tubing off the glass or pull the diffuser by the glass itself — cut the tubing to release it, and reposition by the suction cup.

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 72 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.