Replacement Impeller RSK 600 — Needle Wheel for Reefer Skimmer 600 - Red Sea

Red Sea Replacement Impeller RSK 600 — for the Reefer Skimmer 600

This needle-wheel impeller is the official Red Sea R50531 replacement part for the Reefer Skimmer 600 (RSK 600) AC-pump skimmer. It's the pin wheel of the Sicce PSK 1000 pump that drives this skimmer — the part that shreds air into fine bubbles to produce foam. Over time, a worn or damaged wheel reduces foam production; replacing it restores your skimmer's original performance.

Compatibility

• Red Sea Reefer Skimmer 600 (RSK 600) with the AC Sicce PSK 1000 pump.
• Specific to the 600 AC model: the RSK 300 and 900 use different impellers.
• Does NOT fit the REEFER DC Skimmer 600. The DC model runs a completely different ReefRun DC (PSK DC) pump with its own impeller — the R50531 will not fit it.

⚠️ Special order — final sale

This part is a special order: final sale, no exchanges or refunds. Before ordering, make sure the part model (R50531, RSK 600 AC skimmer) matches exactly what you need. If you're unsure of your skimmer model, contact us before purchasing.

Specifications

• Part: impeller / needle wheel
• Red Sea part number: R50531
• Compatibility: RSK 600 / Reefer Skimmer 600 with AC pump (Sicce PSK 1000)
• Type: replacement / wear part

When to replace it

• Noticeable drop in foam production despite good tuning.
• Unusual noise or vibration coming from the pump.
• Needles/pins worn, chipped, or deformed on inspection.
• Preventive maintenance after extended use.

Why buy from ReefSolution

Authorized Red Sea dealer in Canada — in-store pickup in Laval or shipping across Canada.

FAQ

Will this wheel fit my skimmer?

It's designed for the Red Sea RSK 600 / Reefer Skimmer 600 with the AC pump (Sicce PSK 1000) only. The 300 and 900 models use different parts.

Is it compatible with the REEFER DC Skimmer 600?

No. The R50531 is the impeller for the AC Sicce PSK 1000 pump. The 600 DC model runs a different ReefRun DC pump that has its own impeller. For a DC skimmer, you need the part matching the ReefRun DC pump.

Can I return it if I ordered the wrong model?

No — it's a special order with final sale, no exchange or refund. Please confirm your model before ordering.

How do I know if my wheel needs replacing?

Dropping foam production, abnormal pump noise or vibration, or worn/deformed pins all indicate it's time to replace it.