Reef Octopus Regal 250INT 10in Internal Protein Skimmer (VarioS) fit check
Reef Octopus Regal 250INT 10in Internal Protein Skimmer (VarioS) is an in-sump internal with controller protein skimmer rated up to 300 gallons. Box ratings assume light stocking, so ReefCrafter scales them by bioload: about 200 gallons lightly stocked, 150 gallons medium, or 120 gallons for a heavily fed fish tank.
Reef Octopus Regal 250INT 10in Internal Protein Skimmer (VarioS): fits roughly 150-300 gallon systems. Specs, compatibility math, sizing risks, and…
Who it is for
Good fit for
- ✓ 150-300 gallon systems, per the catalog fit range.
- ✓ Heavily fed tanks up to about 120 gallons, or lightly stocked tanks up to about 200 gallons.
Not a fit for
- ✕ Tanks under about 150 gallons; it is sized above them.
- ✕ Systems over about 300 gallons without adding capacity elsewhere.
- ✕ Heavy-bioload tanks above about 120 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
- controllable VarioS DC pump
- needle wheel
Compatibility math
Bioload headroom
Example: On a 75g mixed reef, ReefCrafter wants about 150g of skimmer rating for medium bioload.
Reef Octopus Regal 250INT 10in Internal Protein Skimmer (VarioS) is rated around 300g, 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 250INT 10in Internal Protein Skimmer (VarioS) fits roughly 150-300 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- Nyos Quantum 160 Protein Skimmer
250 gallon rating vs 300: less headroom, for smaller or lighter-stocked tanks.
- Reef Octopus Regal 200EXT 8in Recirculating Protein Skimmer (VarioS)
250 gallon rating vs 300: less headroom, for smaller or lighter-stocked tanks.
- Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS)
250 gallon rating vs 300: less headroom, for smaller or lighter-stocked tanks.
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
- Premium
- Estimated price
- $799
- Tank fit range
- fits roughly 150-300 gallon systems
- Format
- In Sump Internal With Controller
- Rated skimmer capacity
- 300 gal
Related reading
Questions
Is the Reef Octopus Regal 250INT 10in Internal Protein Skimmer (VarioS) big enough for my tank?
It is rated up to 300 gallons. ReefCrafter wants 1.5x, 2x, or 2.5x the display volume in skimmer rating by bioload, so it fits about 200 gallons lightly stocked, 150 medium, or 120 heavily fed.
What tank size is the Reef Octopus Regal 250INT 10in Internal Protein Skimmer (VarioS) for?
ReefCrafter's catalog fit range for it is 150-300 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 250INT 10in Internal Protein Skimmer (VarioS) against?
Nyos Quantum 160 Protein Skimmer (250 gallon rating vs 300: less headroom, for smaller or lighter-stocked tanks); Reef Octopus Regal 200EXT 8in Recirculating Protein Skimmer (VarioS) (250 gallon rating vs 300: less headroom, for smaller or lighter-stocked tanks); Reef Octopus Regal 250SSS 10in Space-Saving Protein Skimmer (VarioS) (250 gallon rating vs 300: less headroom, for smaller or lighter-stocked tanks).
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