Hydor Slim Skim Nano S03202 Aquarium Skimmer, 4 W

Hydor Slim Skim Nano S03202 is an internal skimmer for marine and nano reef aquariums, with surface water intake and a claimed capacity of up to 135 litres. Its magnet support is specified for glass up to 10 mm thick, while the adjustable collection cup lets you alter the foaming level.

At a glance

Combines protein skimming and surface skimming in one internal unit, according to the product description.
Magnet support is listed for glass up to 10 mm thick.
The collection cup position can be adjusted to change the foaming level.
The listing describes the unit as low-energy and silent, but gives no noise measurement.

Price

£100.95Save 20%

Reference price: ~~£126.19~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Combines a protein skimmer and surface-water intake, reducing the need for separate units for those functions.
Adjustable cup positioning provides a way to tune the foaming level.
The magnetic support is intended for glass up to 10 mm thick.

Cons

Regular cleaning of the pump and collection cup is recommended, so maintenance is part of routine use.

Technical specifications

11 specifications

Capacity and power
Claimed aquarium capacity	up to 135 litres
Power	4 W
Water intake	Water intake system from the surface through a special grid.

Dimensions and installation
Dimensions listed	8 x 8.5 x 30 cm; 997.9 g
Weight listed	998 g
Glass thickness limit for magnetic support	glass up to 10 mm thickness
Minimum height recommendation	30 Centimeters

Design and controls
Installation	Placed internally
Adjustments	Adjustable Height, Easy to Clean, Underwater
Air regulation	Tap for air regulation.
Pump technology	patented Venturi rotor

What to know before buying

Listing details to confirm

Capacity claims differ: the title and feature text state up to 135 litres, while the description says up to 140 litres and 60 litres for heavily stocked reefs. Treat the capacity as uncertain and confirm suitability for the aquarium and stocking level before buying. The listing also gives two slightly different weights, 997.9 g in the dimensions entry and 998 g separately. The title calls the support a magnet suction cup, while the description calls it a magnetic support system.

Who is it for?

A good fit for

Marine and nano reef aquarium owners seeking an internal unit that combines skimming with surface intake.
Set-ups with glass no thicker than 10 mm where magnetic mounting is suitable.
Aquarium keepers who can accommodate regular pump and collection-cup cleaning.

Less suited to

Buyers needing a confirmed capacity above 135 litres or a definitive capacity for a heavily stocked reef.
Aquariums with glass thicker than 10 mm.

Hydor Slim Skim Nano S03202 Aquarium Skimmer, 4 W · photo 2 — Additional product photo 2

Customer reviews on Amazon

3.8 / 5 · 24 ratings

5 stars57%57%
4 stars10%10%
3 stars8%8%
2 stars6%6%
1 star19%19%

Only aggregate ratings are provided, with a divided spread: five-star ratings make up the largest share, but a notable portion are one-star. This suggests experiences are not uniformly positive, though ratings alone do not explain why. They offer limited guidance on noise, skimming performance or suitability, so buyers should weigh the listing's capacity discrepancies and maintenance requirements against their needs.

Frequently asked questions

What aquarium size is this skimmer listed for?

The title and feature text claim up to 135 litres, but the description says up to 140 litres and specifies 60 litres for heavily stocked reefs. Confirm capacity for your set-up before purchase.

What glass thickness does the magnetic support suit?

The listing specifies glass up to 10 mm thick.

Does it also skim the water surface?

Yes. The product description presents it as both a water skimmer and surface skimmer, with water intake from the surface through a grid.

What maintenance is recommended?

The listing recommends regular cleaning of the pump and collection cup, and washing the inside of the skimmer with running water. It also advises cleaning the air tube and tap if air production is low.