Undergravel Filter 20 – undergravel filter, 70 x 30 cm
Undergravel filter for aquariums with sand, active substrate or a mixed planted substrate. It comes as…
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Find a productProduct description
This undergravel filter suits keepers who run a planted or sand-bottomed aquarium and want the substrate itself to do the filtering. It is sized for a 70 x 30 cm base and is assembled from 20 separate grid plates, so the footprint can be adjusted to the tank.
Why it matters
- Substrate as filter media: water is drawn down through sand, active substrate or a mix such as ECO PLANT, so the bed itself traps and holds waste.
- Modular plates: each plate measures 14 x 7 cm and plates can be joined end to end or set perpendicular to each other. Excess connectors can be trimmed to achieve an exact fit.
- Adjustable outlet: the telescopic outlet adjusts from 30 to 50 cm in height, and its tip rotates a full 360 degrees to direct flow.
- Airlift-ready: the included airline and air stone sit in the outlet tube. Connecting an air pump creates the water movement that drives the filter.
Specifications
- Model: Resun RS20P (RS20)
- Set footprint: 70 x 30 cm
- Plates: 20 pcs, 14 x 7 cm each
- Outlet: telescopic, 30–50 cm, 360° rotating tip
- Included: telescopic outlet, airline and air stone
- Not included: air pump
- Weight: 0.4 kg
- EAN: 6933163300486
What it works with
The filter is intended for aquariums with a sand, active substrate or mixed planted substrate, where the bed is in direct contact with roots and detritus. It is designed for a 70 x 30 cm footprint and should be paired with an air pump that is purchased separately to provide the airlift flow.
Technical specification
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Frequently asked questions
Yes. The set includes 20 grid pieces of 14 x 7 cm each, which assemble into a filter plate of 70 x 30 cm. If your tank is a different size, you can connect the pieces to match its dimensions and trim the excess connectors.
The filter works with sand, active substrate, or a natural mix such as ECO PLANT. Water is drawn through this layer, and the substrate is kept cleaner as debris such as fish waste and plant remains is pulled down toward the roots.
An air pump is not included in the set. The set comes with an airline and an air stone that fit into the water outlet tube, and connecting an air pump to them creates the water flow.
The outlet is telescopic and can be set from 30 to 50 cm high. The tip can also be rotated 360 degrees to direct the water flow.
Yes. After arranging the pieces, you can cut off the excess connectors to get exact dimensions. The pieces can also be joined at right angles to each other.
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