Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) fit check
Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) is an in-sump space-saving with controller protein skimmer rated up to 250 gallons. Box ratings assume light stocking, so ReefCrafter scales them by bioload: about 165 gallons lightly stocked, 125 gallons medium, or 100 gallons for a heavily fed fish tank.
Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS): fits roughly 150-250 gallon systems. Specs, compatibility math, sizing risks, and…
Who it is for
Good fit for
- ✓ 150-250 gallon systems, per the catalog fit range.
- ✓ Heavily fed tanks up to about 100 gallons, or lightly stocked tanks up to about 165 gallons.
Not a fit for
- ✕ Tanks under about 150 gallons; it is sized above them.
- ✕ Systems over about 250 gallons without adding capacity elsewhere.
- ✕ Heavy-bioload tanks above about 100 gallons; the box rating assumes light stocking.
- ✕ Hang-on-back or AIO setups without a sump chamber deep enough for it.
Listed features
- 10 in body
- in-sump
- space-saving footprint
- controllable VarioS DC pump
Compatibility math
Bioload headroom
Example: On a 75g mixed reef, ReefCrafter wants about 150g of skimmer rating for medium bioload.
Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) is rated around 250g, so the useful question is whether that clears the fish load with margin.
Risk notes
- A skimmer can be fine for a light reef and thin for the same tank once feeding and fish load increase.
Professional fit context
- Compare rated maximum gallons, physical fit, cup clearance, noise, and bioload margin.
- Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) fits roughly 150-250 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- Nyos Quantum 160 Protein Skimmer
Same 250 gallon rating; compare format and features instead.
- Reef Octopus Regal 200EXT 8in Recirculating Protein Skimmer (VarioS)
Same 250 gallon rating; compare format and features instead.
- Vertex Omega 200i Protein Skimmer
225 gallon rating vs 250: less headroom, for smaller or lighter-stocked tanks.
Livestock this affects
- Kole tang
Bioload score 2.6; size the skimmer for heavy feeding.
- Ocellaris clownfish pair
Bioload score 2.6; size the skimmer for heavy feeding.
- Copperband butterflyfish
Bioload score 2.3; size the skimmer for heavy feeding.
- Tomini tang
Bioload score 2.3; size the skimmer for heavy feeding.
Full spec snapshot
- Category
- Skimmers
- Build tier
- Balanced
- Estimated price
- $699
- Tank fit range
- fits roughly 150-250 gallon systems
- Format
- In Sump Space Saving With Controller
- Rated skimmer capacity
- 250 gal
Related reading
Questions
Is the Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) big enough for my tank?
It is rated up to 250 gallons. ReefCrafter wants 1.5x, 2x, or 2.5x the display volume in skimmer rating by bioload, so it fits about 165 gallons lightly stocked, 125 medium, or 100 heavily fed.
What tank size is the Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) for?
ReefCrafter's catalog fit range for it is 150-250 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 Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) against?
Nyos Quantum 160 Protein Skimmer (Same 250 gallon rating; compare format and features instead); Reef Octopus Regal 200EXT 8in Recirculating Protein Skimmer (VarioS) (Same 250 gallon rating; compare format and features instead); Vertex Omega 200i Protein Skimmer (225 gallon rating vs 250: less headroom, for smaller or lighter-stocked tanks).
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