Inline Diffuser 17 mm

  • Minimizes the visibility of CO2 equipment in the aquarium
  • Ensures maximum dissolution of CO2 in aquarium water
  • Allows for more consistent dosing of CO2
  • Compatible with 16 mm ID/22 mm OD hoses

The 17 mm glass Inline Diffuser is a pollen style inline CO2 diffuser that is placed in the outflow line of the filter or aquarium pump to efficiently diffuse CO2 gas into the aquarium. This placement of the diffuser avoids the need for a diffuser in the aquarium and significantly reduces the visibility of the CO2 injection system in the aquascape. This also allows for more rapid diffusion of CO2 into the system and can allow for more consistent levels and reduce waste of CO2 or overdose of CO2

Compatible with 16 mm ID/22 mm OD hoses. Compatible with 6 mm (1/4") - Standard Airline Tubing. Suction cups included.

Rinse glassware with warm water. Cut filter hose (Compatible with 12 mm ID / 16 mm OD filter hose) to appropriate length so that inline diffuser will hang vertically next to aquarium glass when filter outflow is placed on aquarium. Attach aquarium hose, ensuring that diffuser disc faces “up” toward outflow. Attach suction cups and desired tubing (Compatible with 6 mm (1/4") - Standard Airline Tubing) to the CO2 in line of the diffuser.

Install check valve (not included) inline with 6 mm (1/4") tubing (CO2 in)

To attach tubing and hose to glassware, wet the inside of the tubing or hose with water at the attachment point and carefully slide tubing over glass. The use of other lubricants is not advisable as these usually make the tubing slide off of the glassware too easily. To avoid breakage when removing tubing or hose, do not pull tubing off of glassware. Instead, cut tubing or hose carefully along the attachment length to release the glassware.

Mount your inline diffuser using the suction cup(s). It should be positioned so that it sits vertically on the side or back of the aquarium. When removing or repositioning the diffuser, pull by the suction cup(s) rather than the glass to avoid breakage.

Once securely mounted, turn on filter. Ensure that water passes through diffuser and into aquarium without leaks or bubbles. Turn on CO2. Observe bubble count (bubble counter not included) and adjust CO2 to desired flow rate. Seachem Bubble Counter available for easy monitoring of CO2 flow.

A: The inline diffuser is available in two sizes for filter hose with an inner diameter of 12 mm (fits the 13 mm Inline Diffuser) or 16 mm (fits the 17mm Inline Diffuser). If your filter is significantly larger or smaller than this (to the point that it cannot use filter hose of this size), it is recommended to opt for an in-tank filter like the Seachem Beetle Diffuser or Seachem Spiral Bubble Counting Diffuser.

A: First, check that your tank has a volume CO2 and pressure on the line via any gauges. Second, check any bubble counter in line to see if you have flow of CO2. Next, check for any kinks, blockages, leaks in the line. Lastly, it is often required that the unit run 24 hours before flow of CO2 is consistent. Please allow 24 hours of run time to see if there is a long-term issue.

A: It is possible in time that organics and algae can work to clog the very fine pores that CO2 must flow through. Remove the diffuser and perform a thorough cleaning.

A: To clean a diffuser, generally soaking a unit in a very small amount of bleach and warm water overnight and then soaking in fresh water with Prime® or dechlorinator for a few hours is sufficient to clean away debris and algae. If this is performed without success a soak over night in water with vinegar may be necessary.

Can't find what you're looking for? Ask us a new question. One of the experts from our technical support staff will be happy to promptly respond. You can also call 888‑732‑0003 (Monday- Friday 9:00 AM - 5:00 PM EST) if you would like to speak directly with a technical support representative.

For aquarium use only. Keep out of reach of children. This item is fragile. Use care when handling and removing suction cups and/or hoses. Dispose of broken glass in appropriate container.

3162 Inline Diffuser 17 mm
3162 Inline Diffuser 17 mm Package