Seachem Spiral Bubble Counting Diffuser 23 mm

• For aquariums up to 75 L-190 L (20-50 US gallons).
• Large surface area of diffuser disc ideal for high volumes of CO₂ gas.
• Built in bubble counter makes the use of a separate bubble counter unnecessary.
• Simple and easy to use.

The Spiral Bubble Counting Diffuser is a pollen style CO₂ diffuser that connects to CO₂ injection systems to easily disperse CO₂ gas into the planted aquarium. The built-in spiral bubble counter allows for easy monitoring of the rate of CO₂ injection. The inclusion of a bubble counter in the diffuser makes the use of a bubble counter on the CO₂ tank or in-line unnecessary. The Spiral Bubble Counting Diffuser has a 30 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 built-in spiral bubble counter.

Where this sits in the Seachem range. Functionally the same pollen-style diffuser mechanism as the Slanted and Beetle Diffusers, but the only one in the line with an integrated bubble counter. Seachem notes this makes a separate bubble counter on the CO2 tank or inline unnecessary.

Specifications

Disc size. 23 mm on this listing.

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 before sliding it over the glass attachment point; other lubricants tend to let tubing slip off too easily.

Mounting. Attach the suction cup and tubing, then position the diffuser low in the aquarium. Install a check valve inline with the tubing outside the tank.

Reading the count. Once mounted, turn on the CO2 and observe the bubble count through the built-in spiral counter, adjusting flow to the desired rate. Seachem notes the right bubbles-per-second figure varies by setup, so it’s a starting point to tune from rather than a fixed number.

Removing it safely. Cut tubing free rather than pulling it off the glass, and reposition the diffuser by the suction cup rather than the glass itself, 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.