Euro Series Clear Water Kit

23CW018

Product Details:

PondMAX Euro Series Clear Water Kit (CW1800) is a complete pond filtration system that combines a submersible pond pump, UV water clarifier, gravity flow-through filter, biological media, and all connection hardware in a single matched kit. Designed for ponds up to 1,800 gallons (900 gallons with fish in full sun), the system delivers three stages of pond filtration — mechanical, biological, and UV — to reduce debris, support the nitrogen cycle, and help maintain clear pond water. Suitable for new builds and existing pond upgrades.

FEATURES

Easy-to-install, low-maintenance design for DIY pond owners, no guesswork when sizing the pump or filter
Promotes clear water and a healthier environment for fish and aquatic life
Ideal for a wide range of garden ponds, koi ponds, and water features

Instruction Manuals

Video Tutorials

More Details How to Use Resources

PondMAX Euro Series Clear Water Kit is an all-in-one pond filtration system designed to deliver clear, healthy pond water with straightforward installation. This complete pond pump and filter kit combines mechanical, biological, and UV filtration to help reduce debris, control algae, and support a balanced pond ecosystem.

The filtration process begins with the included FP550 submersible pond pump (550 GPH, 47W) drawing water from the pond and delivering it to the CW1800 gravity flow-through filter tank. Inside the filter tank, water passes through a two-stage mechanical filtration sequence — a coarse black sponge captures larger debris, followed by a fine blue sponge for smaller particles. Bio-Sphere media in the tank base supports biological filtration by providing surface area for beneficial bacteria that process ammonia and nitrite. The integrated UVC9W UV water clarifier (9W) targets free-floating algae before water returns to the pond, helping reduce green water.

All components are matched and included: pump, UV clarifier, filter tank, filter media, spray bar, overflow pipe, 16 ft (5 m) kink-free hose, hose barbs, and fitting accessories. This removes the guesswork of sizing and pairing individual components. The kit is suitable for new pond builds and as an upgrade for existing pond filtration systems.

Technical Specifications

STEP 1 — OVERFLOW PIPE ASSEMBLY

Overflow pipe

1. Insert the outlet adaptor into the hole at the base of the CW1800 filter tank body.
2. Fit the O-ring for the outlet adaptor onto the connector thread from the inner side of the filter body.
3. Bring the overflow pipe to the thread of the outlet adaptor and screw the outlet adaptor until both elements are tightly fixed.

STEP 2 — UV CLARIFIER (UVC9W) ASSEMBLY

Prior to installation, insert the UV-C lamp into the UVC9W Water Clarifier following the lamp replacement instructions in the UVC9W manual. The UVC9W must not operate dry — it must be connected to a running pump at all times.

UVC9W fitting

1. Fit the O-ring for the threaded coupling onto the screw nozzle on the body of the UVC9W Water Clarifier.
2. Insert the screw nozzle of the UVC9W into the corresponding opening on the side of the CW1800 filter tank.
3. From inside the filter tank, screw the intermediate coupling onto the UVC9W screw nozzle fully.
4. Screw the spray bar onto the free end of the intermediate coupling, with the spray bar openings facing downward.
5. Secure the UVC9W to the filter tank using the mounting accessories — from inside the filter box: screw, washer, O-ring; from outside: washer, nut.

STEP 3 — CONNECTING PARTS (PUMP → UVC9W → FILTER → POND)

Pump to UVC9W

1. Insert the elbow adaptor into the corresponding screw ring.
2. Connect one piece of kink-free hose to the pump outlet.
3. Connect the other end of this hose to one of the two included adaptors (which accommodate 1″ or 1-1/4″ / 25 mm or 32 mm hose), pressing until the hose seats at the adaptor base. Fasten with a screw clamp (not included).
4. Install a gasket into the adaptor nut, ensuring it seats at the nut base.
5. Screw the assembled adaptor onto one of the screw nozzles on the UVC9W Water Clarifier body.
Filter tank to pond (return line)

6. Cut the drain tube to match the required hose diameter. Connect the kink-free hose to the drain tube and fasten with a screw clamp.
7. Place the free end of the kink-free hose into the pond to return filtered water.

Power cord routing: Form the power cord of both the FP550 pump and UVC9W clarifier into a drip loop — a downward-facing loop before the plug reaches the socket — to prevent water runoff reaching the socket. Do not run the supply cable underground. Connect to an RCD (residual current device) rated ≤ 30 mA. Verify the voltage on each appliance label corresponds to the mains voltage before connecting.

STEP 4 — LOADING FILTER MEDIA

Filter media loading order

1. Unpack the Bio-Sphere media and distribute evenly across the tank bottom.
2. Place the coarse filter sponge (black, 31PS182) inside the filter tank with the hole positioned over the overflow pipe.
3. Place the fine filter sponge (blue, 31PS181) on top of the coarse sponge, also with the hole over the overflow pipe.
4. Close the filter tank with the lid.
Important: filter media order must be followed exactly — coarse sponge below, fine sponge above. Incorrect order will reduce filtration capacity. See Troubleshooting (Section 06).

Clear Water Kit_Instruction Manual

Not sure what fits? Try Search or visit Support for setup guides.

Need parts? Check the Parts category for replacements that match your model.