Spreads the outflow instead of blasting one corner.
A canister filter returning through a single nozzle blasts one corner of the aquarium and leaves the rest still. Spreading that outflow along a bar fixes both ends of the problem.
Taxes calculated at checkout
Why you'll love it
A single outlet makes a fast lane down one side and a dead corner opposite, where waste settles. A spray bar spreads the same turnover evenly so the whole floor stays swept.
Bettas, fancy goldfish and gouramis fight a jet all day. The same pump through a perforated bar drops the local flow rate without reducing the actual filtration.
Most people who find their canister too strong start shopping for a smaller one. Changing the outlet shape solves it for the price of a takeaway.
Good fit if
Look elsewhere if
All the water a canister moves has to come back into the tank somewhere. Through one nozzle that is a concentrated jet, so you get a fast lane in front of the outlet and dead spots everywhere else. Fish crowd into the still areas, and detritus settles in them.
Spread across a perforated bar, the same volume returns as a broad gentle sheet. Nothing is fighting a jet, circulation reaches the corners, and waste stays in suspension long enough for the filter to collect it rather than settling behind the hardscape.
Long finned fish are the clearest case. A betta, a fancy guppy or a veiltail has a large surface area and poor swimming efficiency, and being pushed around all day is genuinely exhausting for them. Fish from slow water, including most gouramis and many tetras, are in the same position.
The opposite exists too. Hillstream loaches, danios and other river species want current and do poorly without it. If you keep those, the duckbill outlet or the plain nozzle is the better choice, and this kit still helps by letting you point the flow where you want it.
Sixteen millimetre inner and 22 outer is the common canister size used by Eheim and Fluval among others, but check yours before ordering, since a mismatched hose either leaks or will not seat at all. Measure the existing pipe rather than going by the filter model.
The bar can be cut shorter with a fine saw if it overhangs, which is worth doing rather than leaving it protruding. Cap the cut end, since an open end sends most of the flow straight out of it and defeats the perforations entirely. Adjustable clamps grip the rim, and it is worth checking them after the first week as they settle.
The intake matters as much as the outlet. A strainer keeps fish, shrimp and stray plant leaves out of the impeller, and it is the part that clogs first, which shows up as the filter sounding busier while moving less water. Check it whenever you notice the outflow weakening rather than opening the canister.
In the box
How it works
Shop by pet or category to find exactly what your cat or dog needs, no wading through thousands of listings.
Check out securely with card, PayPal or one tap Apple Pay & Google Pay. Free delivery over £45.
Fast, tracked dispatch straight to your door, and a happier pet before you know it.
The details
Loved by real pet parents
One outlet was firing across the front glass and everything settled in the opposite corner no matter how I aimed it. The 49 cm bar spreads the same flow along the back wall and that corner now stays clean. Fitted the 16 mm hose I already had without any messing about.
The bar and intake are the right size for standard 16 by 22 hose and the flow is much better spread than before. My tank has a thick rim and the adjustable clamps only just grip it, so one worked loose in the first week. I have wedged it since and it has stayed.
He spent most of his time pinned behind a plant when the canister was on a single jet. Swapping to the perforated bar dropped the flow he feels without slowing the filter at all. He is out in the open most of the day now.
Worth knowing it turns up without any retail packaging, just the parts loose. Once you get past that the kit is complete: intake with strainer, the bar, the duckbill and a bag of clamps and connectors. Everything lined up on my hoses first go.
I fitted the spray bar first and found it a bit too even for my planted layout. Swapped to the duckbill that comes in the same kit and got a slower swirl that suits it much better. Nice to have both rather than having to buy twice.
My cabinet sits the canister low, so I needed the 43.5 cm intake to reach properly down the back. The strainer has kept plant bits out of the impeller since May. Drilling nothing and cutting nothing was a pleasant surprise.
Straight out of the bag the holes are small, so the far end of the 49 cm bar pushes less than the near end. I widened the nearest few with a pin and it evened right up. Standard sort of fiddling, but worth knowing before you fit it.
Angling the bar slightly up towards the surface has cleared the oily film that used to sit on top. That was not even why I bought it, I just wanted the flow spread out. The clamps hold the angle once you set them.
It does the job and the fit on 16 mm inner hose is snug. The plastic is lighter than the parts that came with my filter, so I am careful when twisting the bar around. No leaks in four months of running.
Good questions
Check the hose, not the brand. If your canister runs 16/22 mm tubing, which most Eheim and Fluval models do, it fits. If yours is 12/16 mm, this is the wrong size.
Yes. It is plain plastic tube, so a hacksaw shortens it to suit a narrower tank. Cap the cut end or the pressure escapes out of it.
Along the back glass, angled slightly at the surface. Pointed straight down it stirs the substrate; aimed at the surface it drives gas exchange without a rippling storm.
It suits 16 mm inner and 22 mm outer diameter hose, which is the common Eheim and Fluval canister size. Measure your existing pipe rather than assuming from the filter model.
Yes, with a fine saw. Cap the cut end afterwards, or most of the flow leaves through the opening rather than the perforations.
At the back glass in most tanks, which circulates water around the perimeter without a strong current where fish swim. Angle it slightly up if you want more surface agitation.
Last reviewed 30 August 2026