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Santa Monica Filtration SURF2xx Algae Scrubber


Starting at $37/mo with . Learn more

Item #: 6Y24523

Shipped by Santa Monica Filtration in 3-5 business days

Santa Monica Filtration SURF2xx Algae Scrubber

The SURF2xx is a floating surface upflow algae scrubber with Green Grabber surfaces, and strings for saltwater, designed to reduce your glass cleaning and water changes while creating an environment for living micro-animals to grow inside the scrubber.

The SURF2xx offers drop-in installation, reduction or elimination of water changes and nuisance algae, along with almost no-light and almost no-sound, and --possibly most important-- one-handed cleaning with no disassembly required. Compared to the SURF2 and the SURF2x, the SURF2xx is the most powerful yet with 8 LED lights, a dual power system, and the ability to filter tanks with phosphates higher than 0.5 ppm.

  • Has over 24 square inches (150 square cm) of extremely rough Green-Grabber® algal growth surface which can grow up to a 2" (5 cm) thick block of green hair algae
  • Ideal in saltwater with phosphate higher than 0.5ppm
  • Quiet, near-silent operation
  • Creates a lower-nutrient ecosystem inside itself which is different from the rest of the water in your aquarium, allowing for optimal algal growth
  • Eliminates almost all salt spray (for saltwater) and allows for minimal bubble production
  • Upflow scrubber technology prevents overflow risk-- since it is ALL underwater, it can`t overflow onto your floor
  • Comes with 3 ft (90 cm) of dual vinyl airline, but requires a 2-outlet air pump that can pump at least 5.0 total liters per minute (0.2 cfm)
  • Will run on both 120V and 240V
  • Comes with two power supplies, each being a 10 ft (300 cm) UL and CE approved power adapter cord with a simple 2-prong U.S. plug, which can easily be modified
  • Can be used as a stand-alone filter or in conjunction with most other filters
  • Dry-Out proof: Power outages will not affect it since it`s always under water
  • Harvested algae can be used to feed your fish, if desired
  • Includes a 1 year warranty for replacement or repair
  • Needs to be cleaned ("harvested") every 7 to 14 days or when thick with growth

  • Includes eight red (660 nm) 3-watt LEDs, which are attached to an aluminum heat sink which is coated in black epoxy; it does get warm
  • The LEDs will give the aquarium or sump a slight red color at night when the aquarium lights are off, which will reduce as the SURF2xx fills with growth
  • The LEDs never need replacing
  • A timer is required to run the LEDs for up to 22 hours per day

  • Dimensions: 6" wide by 8" long by 3" thick (15 cm wide, 20 cm long, 7.5 cm thick)
  • Recommended Water Level: 3" (7.5 cm) of water to operate in
  • LEDs: Eight red (660 nm) 3-watt LEDs, which are attached to an aluminum heat sink which is painted black to reduce heat; it does get warm
  • Requires 2-outlet air pump that can pump at least 5.0 total liters per minute (0.2 cfm), which small low-cost pumps cannot do. Pumps that say they can handle 10 or more airstones, or pumps with 2 tubing attachments instead of one, are best.

1 - 5 Gallons 5 - 10 Gallons 10 - 40 Gallons 55 - 120 Gallons 180 - 300 Gallons 450+ Gallons
RAIN2 x2 x3 x5
DROP.2 x2
Saltwater only
HOG.5 x2
x2 x4
HOG1.3 x2 x4
HOG2 x2 x3 x5
Saltwater only
x2 x3 x4
Saltwater only
x2 x3 x5
Saltwater only
x2 x4
Saltwater only

5 Stars


Reviewed on
June 16, 2019

Yes, I would recommend this.

High performance in a little package.

Pros: High nutrient uptake with a small footprint. Great build quality.

Cons: Expensive.

I have a 175 gallon reefer with 20 fish and 40+ coral, so it’s safe to say I have a high bio load. I have been battling GHA with NoPox, manual removal w/ water changes, and a chaeto reactor. NoPox is great but it has limitations, manual removal is necessary with any route you take, and chaeto doesn’t stand a chance against hair algae. The Surf scrubbers grow an impressive amount of hair algae to out compete what is growing in the display tank. I have two (Surf4x & Surf2xx) and clean them at different times of the week so there’s always enough algae to export NO3 and PO4. I turn them off for 4 hours in the middle of night (at different times) so they’re running while the display lights are on to uptake nutrients before the GHA on the rocks gets it. This is the highest performing nutrient uptake method that I have encountered so far and I have tried them all. I run both Surf’s with one Alita AL15A air pump. Definitely worth the investment for high nutrient systems!.

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