Reef Octopus Regal 200SSS 8in Space-Saving Protein Skimmer (VarioS) fit check
Reef Octopus Regal 200SSS 8in Space-Saving Protein Skimmer (VarioS) is an in-sump space-saving with controller protein skimmer rated up to 200 gallons. Box ratings assume light stocking, so ReefCrafter scales them by bioload: about 135 gallons lightly stocked, 100 gallons medium, or 80 gallons for a heavily fed fish tank.
Reef Octopus Regal 200SSS 8in Space-Saving Protein Skimmer (VarioS): fits roughly 75-200 gallon systems. Specs, compatibility math, sizing risks, and…

Who it is for
Good fit for
- ✓ 75-200 gallon systems, per the catalog fit range.
- ✓ Heavily fed tanks up to about 80 gallons, or lightly stocked tanks up to about 135 gallons.
Not a fit for
- ✕ Tanks under about 75 gallons; it is sized above them.
- ✕ Systems over about 200 gallons without adding capacity elsewhere.
- ✕ Heavy-bioload tanks above about 80 gallons; the box rating assumes light stocking.
- ✕ Hang-on-back or AIO setups without a sump chamber deep enough for it.
Listed features
- 8 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 200SSS 8in Space-Saving Protein Skimmer (VarioS) is rated around 200g, 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 200SSS 8in Space-Saving Protein Skimmer (VarioS) fits roughly 75-200 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- Reef Octopus Regal 200INT 8in Internal Protein Skimmer (VarioS)
Same 200 gallon rating; compare format and features instead.
- Vertex Omega 180i Protein Skimmer
184 gallon rating vs 200: less headroom, for smaller or lighter-stocked tanks.
- Vertex Omega 200i Protein Skimmer
225 gallon rating vs 200: more skimming headroom.
Livestock this affects
- Blue hippo tang
Bioload score 4; size the skimmer for heavy feeding.
- Snowflake moray eel
Bioload score 4; size the skimmer for heavy feeding.
- Achilles tang
Bioload score 3.8; size the skimmer for heavy feeding.
- Dwarf fuzzy lionfish
Bioload score 3.5; size the skimmer for heavy feeding.
Full spec snapshot
- Category
- Skimmers
- Build tier
- Balanced
- Estimated price
- $600
- Tank fit range
- fits roughly 75-200 gallon systems
- Format
- In Sump Space Saving With Controller
- Rated skimmer capacity
- 200 gal
Related reading
Questions
Is the Reef Octopus Regal 200SSS 8in Space-Saving Protein Skimmer (VarioS) big enough for my tank?
It is rated up to 200 gallons. ReefCrafter wants 1.5x, 2x, or 2.5x the display volume in skimmer rating by bioload, so it fits about 135 gallons lightly stocked, 100 medium, or 80 heavily fed.
What tank size is the Reef Octopus Regal 200SSS 8in Space-Saving Protein Skimmer (VarioS) for?
ReefCrafter's catalog fit range for it is 75-200 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 200SSS 8in Space-Saving Protein Skimmer (VarioS) against?
Reef Octopus Regal 200INT 8in Internal Protein Skimmer (VarioS) (Same 200 gallon rating; compare format and features instead); Vertex Omega 180i Protein Skimmer (184 gallon rating vs 200: less headroom, for smaller or lighter-stocked tanks); Vertex Omega 200i Protein Skimmer (225 gallon rating vs 200: more skimming headroom).
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