Return Pumps · Reef Octopus

Reef Octopus VarioS-2 Controllable DC Pump (792 GPH) fit check

Quick answer

Reef Octopus VarioS-2 Controllable DC Pump (792 GPH) is a DC return pump rated 792 GPH at zero head with 9 ft maximum head, drawing 25W. If plumbing cuts flow roughly in half, it delivers about 396 GPH, a 5-10x turnover for roughly 40-80 gallon systems.

Reef Octopus VarioS-2 Controllable DC Pump (792 GPH): fits roughly 30-75 gallon systems. Specs, compatibility math, sizing risks, and alternatives before you…

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Who it is for

Good fit for

✓ 30-75 gallon systems, per the catalog fit range.
✓ Roughly 40-80 gallon systems at 5-10x turnover after typical head loss.

Not a fit for

✕ Tanks under about 30 gallons; it is sized above them.
✕ Systems over about 75 gallons without adding capacity elsewhere.
✕ Plumbing runs approaching 9 ft of head, where flow drops toward zero.

Listed features

controller and float switch included
Apex compatible

Compatibility math

Head-loss margin

rated GPH should cover 5-10x system turnover after derating

Example: A 95g system usually wants about 950-1,900 rated GPH if plumbing cuts flow roughly in half.

Return pumps are judged by delivered flow, not only the zero-head box rating.

Risk notes

Box-rating GPH is measured at zero head. Real stands, elbows, valves, and plumbing cut that number down.

Professional fit context

Check flow chart, head pressure, controllability, plumbing size, and quiet-mode range.
Reef Octopus VarioS-2 Controllable DC Pump (792 GPH) fits roughly 30-75 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.

Alternatives to compare

Sicce Syncra SDC 7.0 WiFi Controllable Pump (800-1900 GPH)
800 GPH vs 792: more flow.
Hygger DC Submersible Aquarium Pump 800 GPH
800 GPH vs 792: more flow.
Sicce Syncra Silent 3.0 Pump (714 GPH)
714 GPH vs 792: less flow for smaller systems.

Full spec snapshot

Category: Return Pumps
Build tier: Balanced
Estimated price: $249
Tank fit range: fits roughly 30-75 gallon systems
Format: DC Return Pump
Maximum flow: 792 GPH

Questions

How much flow does the Reef Octopus VarioS-2 Controllable DC Pump (792 GPH) deliver after head loss?

It is rated 792 GPH at zero head and stops near 9 ft. With roughly half lost to plumbing, plan on about 396 GPH delivered, which ReefCrafter treats as enough for 40-80 gallon systems (a 80-gallon system wants 400-800 GPH delivered).

What tank size is the Reef Octopus VarioS-2 Controllable DC Pump (792 GPH) for?

ReefCrafter's catalog fit range for it is 30-75 gallon systems. Confirm that against your final display volume, sump volume, and livestock plan rather than the box label alone.

What should I compare the Reef Octopus VarioS-2 Controllable DC Pump (792 GPH) against?

Sicce Syncra SDC 7.0 WiFi Controllable Pump (800-1900 GPH) (800 GPH vs 792: more flow); Hygger DC Submersible Aquarium Pump 800 GPH (800 GPH vs 792: more flow); Sicce Syncra Silent 3.0 Pump (714 GPH) (714 GPH vs 792: less flow for smaller systems).