
The Red Sea RSK-900 Reefer Protein Skimmer is a high-performance waste removal device engineered specifically for the maintenance of healthy saltwater reef aquariums. Utilizing advanced bubble generation technology, this unit creates a massive column of fine bubbles that efficiently bind with dissolved organic compounds before they break down into harmful nitrates and phosphates. By continuously skimming these pollutants from the water column, it ensures superior water clarity and stability while reducing the bioload on other filtration systems.
This model features an adjustable venturi intake system that allows for precise control over bubble size and contact time to maximize efficiency across various tank sizes up to 240 gallons. The skimmer is designed with a sleek, compact footprint that fits seamlessly into the sump of Red Sea Reefer systems or any standard aquarium setup. It includes a durable collection cup with an easy-to-clean design and a powerful pump capable of handling high flow rates without excessive noise or vibration, ensuring long-term reliability in demanding reef environments.
Ideal for both intermediate and advanced aquarists seeking to maintain pristine water quality in medium to large reef tanks, the RSK-900 offers the perfect balance of performance and ease of use. Reef keepers who demand consistent biological stability and crystal clear water will appreciate its ability to handle heavy feeding loads and high coral densities effectively. This skimmer is an essential component for anyone dedicated to the long-term success of their marine ecosystem, providing a robust foundation for vibrant coral growth and fish health.
| SKU | 212160 |
| Air Draw | 900 LPH |
| Capacity | Light Bioload - Up to 740 Gallons Medium Bioload - Up to 500 Gallons Heavy Bioload - Up to 240 Gallons |
| Flow Rate | 530 GPH |
| Dimensions | 11.4"L x 10.6"W x 23"H or 12.6"L x 9.4"W x 23"H* |
| Power Type | AC |
| Pump Model | Sicce PSK-1200 |
| Skimmer Type | In-Sump / Internal |
| Aquarium Type | Saltwater |
| Pump Included | Yes |
| Adjustable Flow | No |
| Pump Rotor Type | Needlewheel |
| Additional Notes | *Footprint can be changed depending on the pump's orientation inside of the skimmer body |
| Rec. Water Level | 8" - 9" |
| Power Consumption | 20 Watts |
| Power Cord Length | 7 Feet |
I’ve owned a Reef Octopus before and that was a piece of crap. I read the other review saying that reef octopus was better, there’s no way man. This is a thinner plastic material; however, it operates far better than the reef octopus skimmer and it is super easy to clean compared to others. Make sure it’s at the right water level and have your tank setup to turn off the skimmer when the main return pump turns off. If the water rises in the sump, this skimmer will overflow which is what I’m thinking happened to the other guy. I get very dark green skim from this skimmer and I love it.
The build quality of the Skimmer is thin plastic crap. The skimmer flooded my house two times when it over skimmed. I never had that happen with another skimmer I used. Not recommend for any tank. Junk. I have owned it for over 3 years and was forced to take it off my tank. I would go with a Reef Octopus instead. Save your money on this cheaply manufactured. skimmer. I was sold on it because of the Bio load it can handle for my small sump. I was Very disappointed on how much it skimmed, and it would always get clogged when you tried to empty the skimmer cup. In addition, it is very hard to remove the Skimmer cup when you want to clean it. I have been an experienced reefer since 1992.
Awesome skimmer! Great motor. Easy to dial in. Lots of nice features. And the price was unmatched!
Great skimmer huge collection cup so your not cleaning everyday maybe once a week you have to empty the catch threw the very easy to use drain hose dose the job great in my 200 gal tank
Price History
Red Sea RSK-900 Reefer Protein Skimmer
by Reef Octopus
Protein Skimmers
Reference reading: Species guide on Codexery
Species guides on Codexery
- Maxima clam — Scientific name: Tridacna maxima · Maximum length: 20 cm source
- Bluestreak cleaner wrasse — Scientific name: Labroides dimidiatus · Maximum length: 14 cm source
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19% off RSK 900 Reefer Internal Protein Skimmer
On sale for $485.19 (regular $599.00)
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New lowest price: $485.19 (previous low: $599.00)
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