Skimmers · Eshopps

Eshopps PSK-100H Hang-On-Back Protein Skimmer fit check

Quick answer

Eshopps PSK-100H Hang-On-Back Protein Skimmer is an HOB protein skimmer rated up to 100 gallons. Box ratings assume light stocking, so ReefCrafter scales them by bioload: about 65 gallons lightly stocked, 50 gallons medium, or 40 gallons for a heavily fed fish tank.

Eshopps PSK-100H Hang-On-Back Protein Skimmer: fits roughly 40-100 gallon systems. Specs, compatibility math, sizing risks, and alternatives before you buy.

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Who it is for

Good fit for

✓ 40-100 gallon systems, per the catalog fit range.
✓ Heavily fed tanks up to about 40 gallons, or lightly stocked tanks up to about 65 gallons.

Not a fit for

✕ Tanks under about 40 gallons; it is sized above them.
✕ Systems over about 100 gallons without adding capacity elsewhere.
✕ Heavy-bioload tanks above about 40 gallons; the box rating assumes light stocking.

Listed features

HOB
external pump tucked away
acrylic body

Compatibility math

Bioload headroom

target skimmer rating = display gallons x bioload factor

Example: On a 75g mixed reef, ReefCrafter wants about 150g of skimmer rating for medium bioload.

Eshopps PSK-100H Hang-On-Back Protein Skimmer is rated around 100g, 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-100H Hang-On-Back Protein Skimmer fits roughly 40-100 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.

Alternatives to compare

Bubble Magus Curve 5+ Protein Skimmer
Same 100 gallon rating; compare format and features instead.
Reef Octopus Classic 150INT In-Sump Protein Skimmer
110 gallon rating vs 100: more skimming headroom.
Reef Octopus Classic 110INT Internal Protein Skimmer
90 gallon rating vs 100: less headroom, for smaller or lighter-stocked tanks.

Livestock this affects

Dwarf fuzzy lionfish
Bioload score 3.5; size the skimmer for heavy feeding.
Powder blue tang
Bioload score 3.4; size the skimmer for heavy feeding.
Foxface rabbitfish
Bioload score 3.2; size the skimmer for heavy feeding.
Purple tang
Bioload score 3; size the skimmer for heavy feeding.

Full spec snapshot

Category: Skimmers
Build tier: Budget
Estimated price: $229
Tank fit range: fits roughly 40-100 gallon systems
Format: HOB
Rated skimmer capacity: 100 gal

Questions

Is the Eshopps PSK-100H Hang-On-Back Protein Skimmer big enough for my tank?

It is rated up to 100 gallons. ReefCrafter wants 1.5x, 2x, or 2.5x the display volume in skimmer rating by bioload, so it fits about 65 gallons lightly stocked, 50 medium, or 40 heavily fed.

What tank size is the Eshopps PSK-100H Hang-On-Back Protein Skimmer for?

ReefCrafter's catalog fit range for it is 40-100 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-100H Hang-On-Back Protein Skimmer against?

Bubble Magus Curve 5+ Protein Skimmer (Same 100 gallon rating; compare format and features instead); Reef Octopus Classic 150INT In-Sump Protein Skimmer (110 gallon rating vs 100: more skimming headroom); Reef Octopus Classic 110INT Internal Protein Skimmer (90 gallon rating vs 100: less headroom, for smaller or lighter-stocked tanks).