Reef Octopus Classic 150INT In-Sump Protein Skimmer fit check
Reef Octopus Classic 150INT In-Sump Protein Skimmer is an in-sump internal protein skimmer rated up to 110 gallons. Box ratings assume light stocking, so ReefCrafter scales them by bioload: about 75 gallons lightly stocked, 55 gallons medium, or 45 gallons for a heavily fed fish tank.
Reef Octopus Classic 150INT In-Sump Protein Skimmer: fits roughly 80-210 gallon systems. Specs, compatibility math, sizing risks, and alternatives before you…
Who it is for
Good fit for
- ✓ 80-210 gallon systems, per the catalog fit range.
- ✓ Heavily fed tanks up to about 45 gallons, or lightly stocked tanks up to about 75 gallons.
Not a fit for
- ✕ Tanks under about 80 gallons; it is sized above them.
- ✕ Systems over about 210 gallons without adding capacity elsewhere.
- ✕ Heavy-bioload tanks above about 45 gallons; the box rating assumes light stocking.
- ✕ Hang-on-back or AIO setups without a sump chamber deep enough for it.
Compatibility math
Bioload headroom
Example: On a 75g mixed reef, ReefCrafter wants about 150g of skimmer rating for medium bioload.
Reef Octopus Classic 150INT In-Sump Protein Skimmer is rated around 110g, 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 Classic 150INT In-Sump Protein Skimmer fits roughly 80-210 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- Simplicity 240DC In-Sump Protein Skimmer
120 gallon rating vs 110: more skimming headroom.
- Bubble Magus Curve 5+ Protein Skimmer
100 gallon rating vs 110: less headroom, for smaller or lighter-stocked tanks.
- Eshopps PSK-100H Hang-On-Back Protein Skimmer
100 gallon rating vs 110: 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
- $381
- Tank fit range
- fits roughly 80-210 gallon systems
- Format
- In Sump Internal
- Rated skimmer capacity
- 110 gal
Related reading
Questions
Is the Reef Octopus Classic 150INT In-Sump Protein Skimmer big enough for my tank?
It is rated up to 110 gallons. ReefCrafter wants 1.5x, 2x, or 2.5x the display volume in skimmer rating by bioload, so it fits about 75 gallons lightly stocked, 55 medium, or 45 heavily fed.
What tank size is the Reef Octopus Classic 150INT In-Sump Protein Skimmer for?
ReefCrafter's catalog fit range for it is 80-210 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 Classic 150INT In-Sump Protein Skimmer against?
Simplicity 240DC In-Sump Protein Skimmer (120 gallon rating vs 110: more skimming headroom); Bubble Magus Curve 5+ Protein Skimmer (100 gallon rating vs 110: less headroom, for smaller or lighter-stocked tanks); Eshopps PSK-100H Hang-On-Back Protein Skimmer (100 gallon rating vs 110: less headroom, for smaller or lighter-stocked tanks).
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