Eshopps PSK-75H Hang-On-Back Protein Skimmer fit check
Eshopps PSK-75H Hang-On-Back Protein Skimmer is an HOB protein skimmer rated up to 75 gallons. Box ratings assume light stocking, so ReefCrafter scales them by bioload: about 50 gallons lightly stocked, 40 gallons medium, or 30 gallons for a heavily fed fish tank.
Eshopps PSK-75H Hang-On-Back Protein Skimmer: fits roughly 30-75 gallon systems. Specs, compatibility math, sizing risks, and alternatives before you buy.

Who it is for
Good fit for
- ✓ 30-75 gallon systems, per the catalog fit range.
- ✓ Heavily fed tanks up to about 30 gallons, or lightly stocked tanks up to about 50 gallons.
Not a fit for
- ✕ Tanks under about 30 gallons; it is sized above them.
- ✕ Systems over about 75 gallons without adding capacity elsewhere.
- ✕ Heavy-bioload tanks above about 30 gallons; the box rating assumes light stocking.
Listed features
- HOB
- external pump (cleaner display)
- acrylic body
Compatibility math
Bioload headroom
Example: On a 75g mixed reef, ReefCrafter wants about 150g of skimmer rating for medium bioload.
Eshopps PSK-75H Hang-On-Back Protein Skimmer is rated around 75g, 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.
- Eshopps PSK-75H Hang-On-Back Protein Skimmer fits roughly 30-75 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
Alternatives to compare
- AquaMaxx HOB-1.5 Hang-On-Back Protein Skimmer
Same 75 gallon rating; compare format and features instead.
- AquaReady HOB-1.5 Hang-On-Back Protein Skimmer
Same 75 gallon rating; compare format and features instead.
- IceCap K1-100 Protein Skimmer
80 gallon rating vs 75: more skimming headroom.
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
- Budget
- Estimated price
- $149
- Tank fit range
- fits roughly 30-75 gallon systems
- Format
- HOB
- Rated skimmer capacity
- 75 gal
Related reading
Questions
Is the Eshopps PSK-75H Hang-On-Back Protein Skimmer big enough for my tank?
It is rated up to 75 gallons. ReefCrafter wants 1.5x, 2x, or 2.5x the display volume in skimmer rating by bioload, so it fits about 50 gallons lightly stocked, 40 medium, or 30 heavily fed.
What tank size is the Eshopps PSK-75H Hang-On-Back Protein Skimmer for?
ReefCrafter's catalog fit range for it is 30-75 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 Eshopps PSK-75H Hang-On-Back Protein Skimmer against?
AquaMaxx HOB-1.5 Hang-On-Back Protein Skimmer (Same 75 gallon rating; compare format and features instead); AquaReady HOB-1.5 Hang-On-Back Protein Skimmer (Same 75 gallon rating; compare format and features instead); IceCap K1-100 Protein Skimmer (80 gallon rating vs 75: more skimming headroom).
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