IceCap K3-200 OVP In-Sump Protein Skimmer

The IceCap K3-200 OVP addresses one of the more persistent challenges in sump design: fitting a high-capacity skimmer into a confined footprint without sacrificing performance. At 10.24 by 8.5 inches, the K3-200 OVP takes up less sump real estate than comparably rated skimmers while handling tanks up to 400 gallons under light bioload, 300 gallons under medium bioload, and 200 gallons under heavy bioload. The open volute pump (OVP) design is central to how it achieves this — vertical pump placement allows the output to sit at the lowest possible point inside the skimmer body, which extends the time air and water remain in contact before separation occurs.

Powering the skimmer is IceCap's DCAIR 6.0 pinwheel DC pump, drawing 35 watts and moving approximately 1,200 liters of air per hour alongside roughly 352 gallons of water per hour. The pinwheel impeller shreds incoming air into a dense column of fine bubbles, which is what a protein skimmer needs to efficiently bind dissolved organics and carry them into the collection cup. Because the pump is DC-driven and controllable, output can be tuned across 10 power levels directly from the onboard controller — useful when dealing with fluctuating bioloads, surface skimmate levels, or the settling-in period after introduction.

The K3-200 OVP's pipeless submerged output reduces turbulence inside the reaction chamber, which translates to a more consistent and manageable foam head. The skimmer body is constructed from high-quality acrylic and designed to dismantle completely, so cleaning the neck, cup, and body does not require tools or workarounds. A built-in air silencer keeps ambient noise low, which matters in quiet fish rooms or display cabinetry.

For setup, the K3-200 OVP is designed for sump water depths between 7 and 10 inches. It requires no external pump controller and accepts a standard 8mm inner diameter cup drain line. Hobbyists running a space-constrained sump who need a skimmer capable of handling the waste output of a serious reef system will find the K3-200 OVP a straightforward, well-engineered option.