EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH) fit check
EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH) is a DC return pump rated 3,100 GPH at zero head with 21.5 ft maximum head, drawing 130W. If plumbing cuts flow roughly in half, it delivers about 1,550 GPH, a 5-10x turnover for roughly 155-310 gallon systems.
EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH): fits roughly 120-400 gallon systems. Specs, compatibility math, sizing risks, and alternatives…
Who it is for
Good fit for
- ✓ 120-400 gallon systems, per the catalog fit range.
- ✓ Roughly 155-310 gallon systems at 5-10x turnover after typical head loss.
Not a fit for
- ✕ Tanks under about 120 gallons; it is sized above them.
- ✕ Systems over about 400 gallons without adding capacity elsewhere.
- ✕ Plumbing runs approaching 21.5 ft of head, where flow drops toward zero.
Listed features
- QuietDrive
- Mobius app
- backup battery compatible
Compatibility math
Head-loss margin
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.
- EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH) fits roughly 120-400 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- EcoTech Marine Vectra L1 DC Return Pump (3100 GPH)
Same 3,100 GPH; compare format and features instead.
- Reef Octopus VarioS-8 Controllable DC Pump (2700 GPH)
2,700 GPH vs 3,100: less flow for smaller systems.
- Jebao DCP-10000 Sine Wave Return Pump
2,640 GPH vs 3,100: less flow for smaller systems.
Full spec snapshot
- Category
- Return Pumps
- Build tier
- Premium
- Estimated price
- $649
- Tank fit range
- fits roughly 120-400 gallon systems
- Format
- DC Return Pump
- Maximum flow
- 3,100 GPH
Related reading
Questions
How much flow does the EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH) deliver after head loss?
It is rated 3,100 GPH at zero head and stops near 21.5 ft. With roughly half lost to plumbing, plan on about 1,550 GPH delivered, which ReefCrafter treats as enough for 155-310 gallon systems (a 310-gallon system wants 1,550-3,100 GPH delivered).
What tank size is the EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH) for?
ReefCrafter's catalog fit range for it is 120-400 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 EcoTech Marine Vectra L2 Mobius DC Return Pump (3100 GPH) against?
EcoTech Marine Vectra L1 DC Return Pump (3100 GPH) (Same 3,100 GPH; compare format and features instead); Reef Octopus VarioS-8 Controllable DC Pump (2700 GPH) (2,700 GPH vs 3,100: less flow for smaller systems); Jebao DCP-10000 Sine Wave Return Pump (2,640 GPH vs 3,100: less flow for smaller systems).
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