SunSun CPF-2500 Pond Bio Pressure Filter with 13W UVC — 1,600 GPH, Compact for Small Koi Ponds

The SunSun CPF-2500 Grech is a compact bio pressure filter with integrated 13W UVC designed to mechanically and biologically clarify ponds up to about 1,600 gallons.

Engineered for small fish and koi ponds, the SunSun CPF-2500 combines mechanical foams, biological chambers and a 13W ultraviolet clarifier to reduce suspended solids and promote beneficial bacteria growth. Its pressure-filter design lets you position the unit near the pond and run higher flow rates than many gravity-fed filters, while the quick-handle cleaning system simplifies routine maintenance. The CPF-2500 ships with both 3/4" and 1 1/4" inlet/outlet hose adapters and runs on standard 110–120V, 60Hz power.

How does the CPF-2500 improve water clarity?

The unit removes physical debris through layered mechanical media and reduces free-floating algae using the integrated 13W UVC tube. Meanwhile, the biological chambers nurture aerobic bacteria that break down ammonia and nitrite byproducts.

• Multi-stage mechanical foams trap solids before they circulate.
• Bio-media surface area encourages beneficial bacterial colonies.
• 13W UVC lamp targets single-cell algae for clearer water.
• Pressure design handles higher flows up to ~1,600 GPH.

What maintenance does the filter need and how easy is it?

Maintenance focuses on quick external cleaning rather than frequent media overhaul. The CPF-2500 features a simple quick-handle cleaning mechanism so you can purge trapped solids without fully disassembling the unit.

• Use the quick-clean handle to flush debris from mechanical chambers.
• Occasional inspection and replacement of the UVC bulb as recommended.
• Periodic check of inlet/outlet hose adapters for secure fit and blockage.
• Replace worn foams or bio-media when visibly degraded.

Can it handle koi and a mixed fish stocking?

The CPF-2500 suits ponds with a small koi population or mixed ornamental fish. Capacity guidelines help match the filter to pond size and stocking density for effective biological conversion and mechanical removal.

• Rated for ponds with a small mix of fish and koi up to roughly 900 gallons.
• Suitable for decorative ponds up to roughly 1,600 gallons with light stocking.
• Maximum output about 1,600 GPH to support circulation needs.
• Use alongside supplementary filtration or water changes for heavy stocking.

What are the installation and compatibility details?

Installation is straightforward: position the pressure filter near the pond, connect hoses with the included adapters, and plug into a standard 110–120V outlet. Its compact footprint and pressure-rated housing allow flexibility in placement and plumbing layout.

• Comes with 3/4" and 1 1/4" hose adapters for common pond plumbing.
• Operates on 110–120V, 60Hz household power.
• Pressure-rated design lets you place it above or beside the pond.
• Dimensions and flow specs support integration with most small pond pumps.

Who is this for: The SunSun CPF-2500 Grech is aimed at pond owners with small to medium decorative or lightly stocked koi setups who want an all-in-one pressure filter with UVC clarification. It’s ideal if you need a compact, relatively low-maintenance unit that encourages biological filtration, supports higher flow rates, and can be placed outside the waterline for convenient access.