Red Sea Reefer XXL750 Sump
The genuine Red Sea sump for the Reefer XXL 750 system. This is the factory-moulded sump that sits in the XXL 750 cabinet — the multi-stage chamber carrying return water through mechanical filtration, the skimmer section and the pump chamber, plus a built-in auto top-off reservoir.
Key features
- Factory multi-stage layout — filter sock stage, skimmer chamber and bubble trap, then a final pump chamber, in the sequence Red Sea designed the XXL 750's filtration around.
- Built-in top-off reservoir — holds several days of top-off water so salinity and water level stay steadier between refills.
- Direct-fit replacement — correct chamber dimensions and plumbing points for the XXL 750 cabinet, so your existing pipework, skimmer and return pump transfer across.
Specifications
| Fits | Red Sea Reefer XXL 750 |
|---|---|
| Sump volume | 150 L (40 US gal) |
| Water height in sump | 21–27 cm |
| Skimmer chamber footprint | 71 x 51 cm |
| Pump chamber footprint | 33 x 28 cm |
| Material | Rigid moulded plastic, factory sump |
Will it fit my system?
This sump is specific to the Red Sea Reefer XXL 750 cabinet. Red Sea does not share this moulding with the standard 750, the 750 G2/G2+ or the S-1000 range, each of which uses its own sump. Check your model plate before ordering if you're not certain which 750-series Reefer you have — "XXL 750" and "750 G2+" are different systems.
What's included / Not included
- Included: the moulded sump body, with its built-in filter sock stage, skimmer chamber, bubble trap, pump chamber and top-off reservoir section
- Not included: return pump, skimmer, filter sock, ATO pump and heater — these transfer from your existing sump or are sold separately
Warranty and delivery
Covered by Red Sea's manufacturer warranty on parts, in addition to your consumer guarantee rights under Australian Consumer Law. This is a large moulded item — expect a bulkier parcel or freight delivery than a small spare, and check it clears your cabinet's access opening before ordering.
Common questions
Will this fit my Reefer 750 G2+?
No. The XXL 750 and the 750 G2+ are different systems with different sumps — this part won't fit the G2+ cabinet's sump bay.
Can I reuse my return pump and skimmer with the new sump?
Yes — the sump is sold as the moulded body only, so existing equipment transfers across, provided it's not what's being replaced.
Does the top-off reservoir come with a pump?
No. The reservoir chamber is built into the sump, but the ATO pump and sensor are a separate part.
