Reef Octopus Powerheads

Reef Octopus Powerheads

Octo Pulse wave pumps with WaveEngine flow control
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Reef Octopus Skimmer & Pump FAQs

Are Reef Octopus skimmers good?
Yes, and they have earned it. Reef Octopus skimmers are built from heavy cast acrylic with replaceable pumps, gaskets and gate valves, which is why you still see decade-old Classic models running on established reefs.

The trade-off is honest: they prioritize durability and consistent skimming over the smallest possible footprint or the flashiest controller. If you want a skimmer you set once and forget, this is the range. If you want app-driven electronics, look at the Regal and Elite series with VarioS DC pumps instead of the Classic line.
What size Reef Octopus protein skimmer do I need?
Size by bioload, not just by display volume, and then go one size up. Manufacturer ratings assume moderate stocking, so a skimmer rated for 150 gallons running on a 100-gallon reef will outperform one rated for exactly 100.

A heavily stocked fish tank needs more skimming than a lightly stocked SPS reef of the same volume. Also check two physical numbers before you order: the skimmer's footprint against your sump chamber, and its recommended operating water height against your actual sump level. Getting those wrong is the most common reason a good skimmer underperforms.
How do you tune a Reef Octopus skimmer?
Set your sump water level to the skimmer's recommended operating height first. Almost every tuning problem is really a water height problem.

Then give it one to two weeks to break in. New acrylic is hydrophobic and skims erratically until it wets out, so resist adjusting it daily. Once it settles, use the gate valve in small increments and wait several hours between changes: raise the water level in the body for wetter, faster skimmate, lower it for darker and more concentrated. Finally, wipe the collection cup neck weekly. A film on the neck is the number one cause of a skimmer that suddenly "stopped working."
What do INT, SSS and EXT mean on Reef Octopus skimmers?
They describe how the skimmer mounts, not how well it performs.

INT (internal) sits inside your sump and is the most common choice. SSS (Space Saving Skimmer) is also in-sump but uses a narrower, elongated footprint for tight cabinets. EXT (external) is a recirculating skimmer that sits outside the sump on the cabinet floor, fed by its own feed pump, which suits large systems and fish rooms where sump space is scarce. So a Regal 200INT and a Regal 200SSS skim comparably; they just fit different cabinets.
Which Reef Octopus pump should I choose for my tank?
For a return pump, match flow to your tank size and plumbing head height. The VarioS-2 (792 GPH) suits nano and small systems, the VarioS-4 and VarioS-6 (1,050 and 1,720 GPH) cover most mid-size reefs and high-bioload tanks, and the VarioS-8 and VarioS-10 (2,700 and 4,220 GPH) handle large displays and multi-tank systems. All VarioS pumps are controllable DC, so you can dial flow down if you oversize.

Choose a Water Blaster or Bubble Blaster AC pump instead when you want maximum flow per dollar and do not need speed control. For flow inside the display, use Octo Pulse wave pumps rather than a return pump.

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More info and buying tips

The Reef Octopus Equipment Range

Reef Octopus has spent two decades building a reputation on one thing: equipment that runs for years without drama. The lineup covers the mechanical heart of a reef system — Reef Octopus protein skimmers, VarioS controllable DC pumps, Octo Pulse wave pumps, reactors and reef sumps — all built from heavy-gauge cast acrylic with serviceable parts you can actually replace. If you are assembling saltwater aquarium equipment that needs to run hard on a large system, this is the range to look at.

Reef Octopus Protein Skimmers: Classic, Regal and Elite

Skimming is what Reef Octopus is best known for, and the Reef Octopus skimmer range is organized by series and by how it mounts in your sump.

  • Classic — the proven workhorse line, including the Classic 110-INT, 150-INT and the space-saving 110SSS and 150SSS. Simple, quiet and hard to kill.
  • Regal — driven by VarioS DC skimmer pumps for adjustable, energy-efficient performance. Available as 150INT, 200INT and 250INT internal models, 150–300SSS space savers, and 200–300EXT recirculating skimmers.
  • Elite — super cone body geometry (200SSS, 220SSS, 220INT) for finer bubble production and a more stable foam head on heavily stocked reefs.
  • SRO light commercial — the 5000EXT through 9000EXT and XP8000 models for frag systems, fish rooms and multi-tank builds.

Reading the model names: INT means in-sump (internal), SSS is a space-saving footprint for tight cabinets, and EXT is an external recirculating skimmer that sits beside the sump. Match the form factor to your cabinet before you fall in love with a model number.

How to Size and Tune a Reef Octopus Skimmer

  • Size up, not down. Rate the skimmer for more water volume than your display holds. A skimmer running relaxed on a heavy bioload outperforms one running at its limit.
  • Set your sump water height first. Every Reef Octopus skimmer has a recommended operating depth. Get the sump level right and the skimmer nearly tunes itself; fight the water height and it never settles.
  • Expect a break-in period. New acrylic needs one to two weeks before it skims consistently. Do not chase the adjustment valve during the first few days.
  • Tune with the gate valve, slowly. Small adjustments, then wait several hours. Raise the valve for wetter, faster skimming; lower it for drier, more concentrated skimmate.
  • Clean the neck weekly. A film on the collection cup neck is the single most common cause of a skimmer that "stopped working."

VarioS DC Pumps and Water Blaster Return Pumps

The Reef Octopus return pump lineup runs from the VarioS-2 at 792 GPH up through the VarioS-4, VarioS-6, VarioS-8 and VarioS-10 at 4,220 GPH, all with controllable DC speed and a dry-start protection circuit. Choose based on tank size and setup: the VarioS-6 is ideal for larger systems with a high bioload, while the VarioS-2 provides efficient circulation on smaller tanks. Dedicated VarioS-2S, 4S and 6S skimmer pumps drive the Regal and Elite bodies, and the Water Blaster and Bubble Blaster AC pumps remain the budget-friendly option when you do not need controllability.

Octo Pulse Wave Pumps

Octo Pulse wave pumps deliver broad, controllable flow rather than a narrow jet. The Octo Pulse 2 and 4 are available as pump-only units or bundled with the WaveEngine LE controller, and the 2+ and 4+ ship controller-ready. If your priority is tunable flow patterns over raw output, this is where Reef Octopus fits your build.

Reactors: Calcium, Biopellet, Kalkwasser and CO2 Scrubbers

  • Calcium reactors — the VarioS CR140 (5.5") and CR200 (8") and the SRO CR3000D dual-chamber unit keep alkalinity and calcium stable on stony coral systems without daily dosing.
  • Biopellet reactors — the BR110 and BR140, plus the BR1000SS/2000SS/3000SS space savers, drive carbon-dosed nutrient export for low-nutrient SPS tanks.
  • Kalkwasser reactors — the KS100 and KS250 Nilson kalk reactors pair with an auto top-off to hold pH and alkalinity steady overnight.
  • BioChurn — the 90INT and 90ext fluidized biomedia reactors handle biological filtration in-sump or hang-on-back.
  • Universal CO2 Scrubber — reduces CO2 reaching your skimmer intake, which raises and stabilizes pH and improves oxygenation. Especially worthwhile in a closed-up house where indoor CO2 runs high and pH sags overnight.

Browse the full Reef Octopus reactor range to match a reactor to your system volume.

Octo Reef Sumps

The Octo reef sump series — 15A, 24A, 30A and 36A — gives you a filter sock chamber, skimmer section and return chamber in a footprint sized to common cabinet widths. Confirm your skimmer’s recommended water height against the sump’s skimmer chamber depth before ordering, since that pairing determines how well the skimmer tunes.

Expert Advice

  • Selecting the right equipment: Consider the overall size of your system and its goals. Low-nutrient, high-pH systems built around SPS benefit most from a larger Reef Octopus skimmer paired with a CO2 scrubber. If controllable flow matters more to you, the Octo Pulse powerheads are the better investment.
  • Installation: Install to the manufacturer’s guidelines and get the equipment level. Proper positioning and a level sump extend the life of your gear and maximize its effectiveness.
  • Optimizing performance: Clean pump intakes and impellers, rinse the skimmer neck and cup, and replace scrubber media on schedule. Nearly every "failed" piece of reef equipment is actually a clogged one.

Not sure which model fits your build? The same team that runs our coral farm uses this gear daily — reach out before you buy and we will size it against your actual system.