As an Amazon Associate, Reef Bench earns from qualifying purchases, at no extra cost to you. Commission never buys a ranking, softens a drawback or changes a verdict. Where we haven’t verified an exact UK listing, the button opens an Amazon search for that model, so check the model, seller and warranty before you order.
QUICK VERDICT
Our picks at a glance
The Bubble Magus Mini Q is the budget internal pick, the Fluval PS2 is the first one to check if you own a Fluval Evo, and the Tunze 9001 DC buys you adjustable output and extra capacity.
Best budget nano skimmer
Bubble Magus Mini Q
£45.59
The cheapest compact internal option
Search Amazon UK ↗Best for the Fluval Evo
Fluval Sea PS2
£54.99–£84.99
The natural first choice for a Fluval Evo
Search Amazon UK ↗Best adjustable nano skimmer
Tunze Comline 9001 DC
£157–£165
Costs more, but adjustable with extra capacity
Search Amazon UK ↗OUR PICKS IN DETAIL
Who each one is really for
Best budget nano skimmer
Bubble Magus Mini Q
Best for
The cheapest compact internal option
Why we picked it
Up to 75L; 2W; minimum 160mm water
The catch
Internal; 82 × 53 × 225mm
Yes, if it fits your chamber exactly and keeping cost and power use low is your priority.
Search Amazon UK ↗Best for the Fluval Evo
Fluval Sea PS2
Best for
The natural first choice for a Fluval Evo
Why we picked it
20–80L; 8W; designed to fit Fluval Evo 52L
The catch
Internal / bracket; 80 × 80 × 260mm
Yes, it’s the first one to consider for a Fluval Evo 52L. Still measure the opening and cup clearance.
Search Amazon UK ↗Best adjustable nano skimmer
Tunze Comline 9001 DC
Best for
Costs more, but adjustable with extra capacity
Why we picked it
20–160L; about 5W, 8W max; 150l/h air
The catch
Internal magnetic; same 110 × 63 × 215mm body
Yes, if being able to fine-tune it is worth paying more than the non-adjustable alternatives.
Search Amazon UK ↗HOW WE RESEARCHED
How we chose
We compared manuals, manufacturer specifications, current UK retailer listings, running requirements, ownership costs and support. This is desk research, not hands-on testing, and where something is uncertain we say so.
- Chamber and cup clearance
- Published tank and air ratings
- How it mounts
- Power use
- UK price and spare parts
All five compared
| Model / price | Mounting and size | Published rating | Best for |
|---|---|---|---|
| Bubble Magus Mini Q £45.59 | Internal; 82 × 53 × 225mm | Up to 75L; 2W; minimum 160mm water | The cheapest compact internal option |
| Fluval Sea PS2 £54.99–£84.99 | Internal / bracket; 80 × 80 × 260mm | 20–80L; 8W; designed to fit Fluval Evo 52L | The natural first choice for a Fluval Evo |
| Bubble Magus QQ1 £58.99 | Hang-on; about 145 × 110 × 265mm | Up to 100L claim; 8.5W | Keeps the skimmer out of a crowded display |
| Tunze Comline 9001 £94.95–£124.95 | Internal magnetic; 110 × 63 × 215mm | 20–140L; 2.5W; 100l/h air | A proven, efficient internal option |
| Tunze Comline 9001 DC £157–£165 | Internal magnetic; same 110 × 63 × 215mm body | 20–160L; about 5W, 8W max; 150l/h air | Costs more, but adjustable with extra capacity |
Choose how it mounts first
Neat and hidden, but only if the body, magnet, water depth and cup all fit the chamber.
Simple and needs no sump, but you’ll see it and it takes up display space.
Saves space inside the tank, but needs room behind it, has water running outside the tank and is visible from the back.
A perfectly valid nano setup if you stock lightly and stay on top of water changes, aeration and media cleaning.
If you own a Fluval Evo 52L
The PS2 is sold specifically for the Evo, so it’s the first one to check. That doesn’t automatically make it the best performer. Measure the chamber, any lid changes and the space to lift out the cup, then compare its £55–£85 price with the smaller Bubble Magus Mini Q and the pricier Tunze models. If your tank is lightly stocked, read whether you need a skimmer at all before giving up chamber space.
Sources and limits
We checked Tunze dimensions, water depth, air capacity and power against Tunze’s current product pages. Fluval and Bubble Magus details and UK prices were cross-checked with current listings from Homeleigh, Shirley Aquatics, Complete Aquatics, Essex Marine Aquatics, Finest Aquatics and Marine Aquatics. We haven’t verified noise, break-in time or microbubbles ourselves.
WHICH ONE FITS YOU?
Start with your chamber, not the litre rating
You own a Fluval Evo 52L
The PS2 was designed around this tank, so check it first. Still measure the chamber opening, how it sits with the lid, and the path to lift the cup out. A matching brand doesn’t guarantee a hassle-free fit.
An open-top nano with no sump
An internal Tunze or a hang-on Bubble Magus can both work, but they use space differently. Internal skimmers take up display or rear-chamber space; hang-on models need safe room behind the tank and send water outside it.
A lightly stocked nano
You may not need a skimmer at all if you keep on top of water changes, aeration, media cleaning and feeding. Weigh up skipping it altogether and keeping that precious chamber space.
HOW TO CHOOSE
What to check before you buy
Measure four clearances
Note the body’s footprint, the room for its magnet or bracket, the water depth it needs, and the height needed to lift out the cup. Miss one, and even a tiny skimmer can be unusable.
Don’t trust the headline litres
Nano ratings assume very different nutrient loads. Look at air intake, physical size, how heavily you stock and feed, and how you’ll maintain it, alongside the published range.
Expect a settling-in period
New skimmers can foam unevenly or release microbubbles while the plastics condition. That doesn’t mean every problem will sort itself out; if it continues, check the installation and water level.
Make sure you can reach it
The cup, air intake and pump all need regular cleaning. A hidden rear-chamber skimmer loses its appeal if you have to remove the lid and light every time you empty the cup.
RUNNING COSTS
What it costs after you buy it
Electricity
Small skimmers use very little power, so the purchase price and maintenance matter more than the electricity bill. Still include them in your running costs, as they run around the clock.
Spare parts
Air tubing, silencers, impellers, magnets and pumps may need replacing. Reliable access to UK spares can be worth more than saving a few pounds on an unfamiliar brand.
The space it takes
A skimmer can push out media baskets, heaters or sensors. In a nano all-in-one, the chamber space you lose may cost you more than the skimmer itself.
ALTERNATIVES
Other options worth a look
Skip the skimmer
Light stocking, good surface movement and regular water changes make a perfectly sound setup. You just need to monitor nutrients deliberately rather than assume the tank will look after itself.
A hang-on-back skimmer
A hang-on keeps your chambers free, but needs careful placement in case of leaks, room behind the tank, and a plan for restarting it safely after cleaning or a power cut.
HOW WE RANK
What it takes to make our list
It has to fit
Before we compare features, we rule out anything that doesn’t suit the tank, the installation or the job. A famous name can’t win if its size, operating range, connections or controls make it a poor match.
Claims need context
A spec sheet tells you what a product is designed to do, not how it will behave in your reef. So we look at the conditions behind every capacity, flow, output and accuracy claim, and flag any conclusion that’s an informed judgement rather than a measurement.
Every pick shows its catch
Each product’s main drawback sits right next to its biggest strength. We don’t hide a support worry, a missing accessory, a vague rating or a pricey ecosystem just because the product is the best choice for one type of buyer.
UK ownership breaks ties
Availability, what’s actually in the box, consumables, spares, UK plugs and the warranty route all count. When two products do the job equally well, the one that’s easier to own in the UK gets the stronger recommendation.
We don’t publish a one-size-fits-all league table. Each award answers a different buying situation, and the final verdict explains which trade-off we’d make. If your tank, budget or routine doesn’t match any of them, use the checks above to build your own shortlist rather than just buying the top badge.
COMMON QUESTIONS
Frequently asked questions
Does every nano reef need a protein skimmer?
No. It depends on your stocking, feeding, gas exchange and how else you remove waste. A skimmer is useful, not compulsory.
Why is my nano skimmer releasing microbubbles?
Installation depth, new plastics, additives, water chemistry and outlet design can all play a part. Follow the manual, and don’t assume ‘breaking in’ explains bubbles that never stop.
Can I choose based on the maximum litres?
Only as a rough guide. Allow plenty of margin if you feed heavily, and check the size and water-depth requirements fit your actual tank.
BEFORE YOU ORDER
Three checks before you pay
Confirm the exact model
Shop listings often mix up generations, sizes and regional versions. Check the full model code, UK plug, included accessories and who handles the warranty against the manufacturer’s own details. Save the product page and spec sheet in case the listing changes.
Price everything it needs
Add the mount, controller, adapters, consumables, test kit and likely replacement parts you’ll need to run it. Compare that first-year total, not the headline price, and keep a little extra for plumbing, cable tidying or the fitting you forgot.
Measure twice at home
Measure your tank, cabinet, sump chamber, glass, sockets and the space you need to service it. Then write down the one job this kit has to do, and how you’ll know it’s working. If it won’t fit, or you can’t tell whether it’s doing its job, it’s the wrong choice.
Prices and stock change quickly. Every price here is a dated UK snapshot, so confirm the total at checkout and the returns terms, and don’t swap in a similarly named model without running these checks again.
OUR VERDICT
Choose a skimmer your nano can live with
Pick the Mini Q for a budget internal skimmer, the PS2 as your first check on a Fluval Evo, and the Tunze 9001 DC if adjustable output and extra capacity justify the higher price. And if your maintenance routine genuinely supports it, choosing no skimmer is a valid answer too.
Whichever you choose, log your nitrate and phosphate results in the free Reef Companion, so you can see whether your nutrient export is really working.