The Reef Octopus eSsence S-130 Protein Skimmer is a compact in-sump design built for hobbyists who want strong skimming without dedicating much sump real estate to it. Rated from 75 gallons at heavy bioload up to 160 gallons at light bioload, it runs the efficient Aquatrance 1800s pump at just 11 watts. Bioload capacity: 75 gallons (heavy), 120 gallons (medium), 160 gallons (light), excluding sump Pump: Aquatrance 1800s pinwheel pump, 11 watts Features: dome bubble chamber for extended dwell time, twist-and-lift collection cup that doubles as a detachable air silencer, calibrated 16-step click-dial water level adjustment, quick-release tabs for pump access Noise: up to 12% quieter than standard silencers, plus a 360° submerged output for splash-free discharge The click-dial adjustment is a small but useful detail — instead of guessing at a valve position, you set a numbered step and can return to it exactly after cleaning.Compatible replacement parts: Aquatrance 1800s pump kits and collection cups for the eSsence S-130.
