Grech CBG‑800S – cascade filter
Grech CBG‑800S is an external cascade filter from SunSun, with a 6 W pump and up to 800 l/h flow. It suits…
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The SunSun CBG-800S is an external cascade filter for aquarium owners who want to free up space inside the tank. Its return cascade also aerates the water, and its bottom intake and surface skimmer both draw water from the tank.
Why it matters
- Three-stage filtration: a sponge handles mechanical filtration, bio-ceramic balls host bacteria that reduce NH3, NH4 and NO2, and activated carbon binds metals, humic substances, pesticides and metabolic products while clarifying the water.
- Two intakes: the lower tube draws water from near the bottom to remove debris that can cloud the substrate. The surface skimmer removes floating particles and the protein film from the water surface.
- Stepless flow control: the main flow is adjustable without fixed steps, and the skimmer has its own regulator that sets its share of flow between 0% and 100%, alongside the bottom intake.
- Easy media access: the media baskets hold the loose media, and each media drawer has a handle for quick removal during maintenance.
Specifications
- Brand: SunSun
- Model: CBG-800S, without UV
- Pump power: 6 W
- Maximum flow: 800 l/h
- Dimensions: 229 x 127 x 179 mm
- Weight: 1.62 kg
What it works with
The filter is designed for aquarium setups where external cascade filtration is preferred over internal units. Its three media stages can be configured to match the needs of the tank, and the flow can be tuned to the aquarium's volume and stocking. Compatibility with a specific tank size should be checked against the manufacturer's tank range before purchase.
Technical specification
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Frequently asked questions
No. It is designed to sit outside the tank, which saves space inside the aquarium, and the water returning through the cascade also aerates the water.
No. The SKU is SUNSUN KASKADA CBG-800S BEZ UV, which means the model is sold without a UV sterilizer.
It has three stages: mechanical filtration with a sponge, biological filtration with bio-ceramic balls that host bacteria reducing NH3, NH4 and NO2, and chemical filtration with activated carbon. Each medium has its own dedicated space, and media can be pulled out quickly by their drawer handle.
The skimmer draws water from the surface, removing floating debris and the surface film of protein. Its flow can be adjusted from 0% to 100% using the regulator on the skimmer tube, together with the bottom intake.
The pump uses 6 W and the maximum flow is 800 l/h. The flow is steplessly adjustable, so you can set the filter's performance as needed.
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