Aquael Ultra Filter External Aquarium Filter 1200/1400 L/h
£187.99
Aquael SAS 500 is a compact surface skimmer filter for 20-500L aquariums, designed to remove protein film, dust and plant debris while keeping surface movement steady.
Aquael SAS 500 is a compact surface skimmer filter for 20-500L aquariums, designed to remove protein film, dust and plant debris while keeping surface movement steady.
Aquael SAS 500 Surface Skimmer Filter is an internal aquarium surface filter designed for one job many ordinary filters miss: keeping the waterline clear. It draws water through a floating surface intake, collects dust, protein film and fine plant residue on a dense sponge pre-filter, then returns moving water back to the aquarium.
That surface layer is more than cosmetic. When film builds up, it can reduce gas exchange, dull the view into the tank and stop light reaching a planted layout cleanly. The SAS 500 is useful for open-top aquariums, planted aquascapes after trimming, busy community tanks and any setup where small debris gathers at the top between normal maintenance.
This is the official Aquael SAS Filter 500 model. Aquael lists it for aquariums from 20 to 500 litres, with a 4.4W pump and a maximum flow of 500 l/h. The flow is adjustable, so the same unit can be softened for a smaller water surface or opened up for a larger aquarium. Treat it as a surface-skimming filter that improves surface clarity, water movement and aeration support, rather than as the only biological filtration for a heavily stocked tank.
The visible improvement happens at the water surface. The SAS 500 helps remove the flat, oily look caused by protein film, so reflections look cleaner and the aquarium appears brighter from above and from the front glass. In planted tanks, this is especially helpful after pruning or replanting, when loose leaves and fragments can sit on the surface instead of being pulled into a normal filter intake.
The body is tall, slim and black, so it is best positioned near the rear or side glass where it can work without becoming the focal point. The suction-cup holder keeps the unit in place, while the floating intake automatically follows normal water-level movement. That means less daily adjustment than a fixed-height skimmer, provided the aquarium water level stays within the working range.
| Model | Aquael SAS Filter 500 |
|---|---|
| Manufacturer article number | 129896 |
| Aquarium capacity | 5-130 US gal / 20-500 L |
| Maximum efficiency | 130 US gal/h / 500 L/h |
| Power | 4.4 W |
| Filter role | Internal aquarium surface skimmer/filter |
| Main use | Removing surface film, dust and fine plant residue |
The unit sits inside the aquarium with the intake at the surface. Water and floating debris enter through the moving float, then pass through the filter chamber. Fine debris is caught by the sponge pre-filter, so the surface looks clearer and the main filter has less floating material to deal with.
Aquael highlights the SAS 500 as a simple answer to bacterial scum, protein film and dust on the surface. Instead of wiping the waterline with paper towel or relying only on spray-bar agitation, the filter continuously pulls that top layer into the chamber. The result is a cleaner-looking surface and steadier gas exchange, especially in tanks with lids removed, dense planting or frequent aquascaping work.
The SAS 500 includes a built-in sponge pre-filter to reduce the risk of shrimps or small fish being pulled into the motor compartment. That matters in planted community aquariums where surface film is common and smaller livestock may explore every part of the tank. As with any powered intake, placement and observation still matter: watch the first run, check the sponge regularly and clean it before flow drops.
Installation is straightforward. Attach the unit with the suction-cup holder, set the floating intake at the water surface, then adjust the flow to suit the aquarium. Smaller tanks and calm aquascapes usually need gentler movement; larger tanks or tanks with persistent film may need a stronger setting. The maintenance-free float follows normal water level changes, which is one of the practical advantages of this design.
Maintenance is mainly about keeping the pre-filter sponge clear. Rinse the sponge in removed aquarium water during routine maintenance, not under hot tap water, so debris is removed without shocking the aquarium system. If surface film returns or flow weakens, the sponge is usually the first thing to check.
A standard internal filter mainly pulls water from below the surface. A surface skimmer targets the very top layer, which is why it is more effective against protein film and floating particles. If your issue is cloudy water throughout the tank, poor biological filtration or a high waste load, check your main filter capacity as well. If your main complaint is the oily layer at the top of an otherwise healthy aquarium, the Aquael SAS 500 is a much more focused fix.
This listing is for the Aquael SAS Filter 500 surface skimmer/filter, SKU AQ96, matched to Aquael article number 129896. It is an internal surface-filter unit, not a heater, UV steriliser, external canister filter or complete aquarium kit. The product images show the filter body, outlet/detail views and the retail box so you can confirm you are buying the correct SAS 500 model.
The SAS 500 is a good choice when you want a neat, purpose-built answer to surface film without changing the whole filtration system. It has the useful parts of a surface skimmer - floating intake, adjustable flow and sponge pre-filter - in a compact Aquael unit with low 4.4W power use. For many aquariums, that is the difference between a tank that looks clean only after maintenance and one that stays clearer at the waterline every day.
It is an internal surface skimmer/filter. It helps remove film and floating debris from the water surface, but it should not be treated as the only biological filter for a heavily stocked aquarium.
Aquael lists the SAS Filter 500 for aquariums from 20 to 500 litres, with adjustable flow and a maximum efficiency of 500 l/h.
Yes. The main purpose of the SAS 500 is to remove surface film, dust and small plant residue from the top of the water.
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