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Octo Classic 200INT Protein Skimmer (OPEN BOX)
SKU: OB-CLSC-200INT
- The Classic 200-INT is an in-sump protein skimmer rated for aquariums up to 250 gallons.
- It runs on a 35-watt Aquatrance 3000s pinwheel pump and requires 7.5-8.5in sump water height.
- Solid cast acrylic body with hybrid cone design, bubble diffuser, gate valve, and cup drain.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
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Open box: new, inspected, ready to use
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FREE Shipping on orders over $75.00
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Backed by a 90-Day Warranty
In-Sump Protein Skimmer for Aquariums up to 250 Gallons with Aquatrance 3000s Pump
The Reef Octopus Classic 200-INT (SKU: CLSC-200INT) is a high-capacity, heavy-duty in-sump protein skimmer engineered to be the primary filtration engine for marine aquariums up to 265 gallons. Designed for hobbyists maintaining large reef or fish-only displays, the Classic 200-INT delivers industrial-strength nutrient export without a premium price tag. Powered by the robust Aquatrance 3000s pinwheel pump, this skimmer pulls a massive volume of air into its 8-inch reaction chamber, producing an ultra-dense cloud of micro-bubbles that traps dissolved organic compounds before they can break down into harmful nitrates and phosphates.
Constructed from high-grade cast acrylic, the Classic 200-INT features a specialized hybrid cone body shape. This gradual taper minimizes internal water turbulence as bubbles rise, allowing the foam column to steadily pack and dry out before pushing over the rim into the collection cup. An integrated bubble plate diffuser ensures that the turbulent water rushing from the pump is evenly distributed and calmed at the base of the chamber. Equipped with a precision gate valve output for seamless water level adjustments and a quick-release collection cup, this internal workhorse offers superior reliability for serious marine systems.
Key Features:
Generous In-Sump Footprint: Ideal for mid-to-large size sump filtration compartments with heavy biological filtration needs.
Aquatrance 3000s Pump: Draws an impressive 800 L/H of air while operating at an energy-efficient 20 Watts.
Bubble Diffuser Plate: Reduces chaotic internal churning to maximize structural foam stability in the neck.
Precision Gate Valve Control: Raised adjustment assembly allows you to surgically dial in the internal water level without splashing.
Twist & Lift Maintenance: Secure neck seal design allows the collection cup to be removed easily for routine cleaning.
Bioload Handling:
Heavy Bioload: 160 Gallons
Medium Bioload: 210 Gallons
Light Bioload: 265 Gallons
Ideal For:
- Reef and marine aquariums from 100 to 250 gallons needing a reliable, sump-based skimmer
- Well-stocked systems with heavy bioload where consistent skimmate production is a priority
- Builds where a quiet, energy-efficient skimmer pump matters
- Aquarists who want straightforward maintenance access via cup drain, quick-release neck, and union pump mount
- Sumps with 7.5-8.5in of available water depth in the skimmer chamber
Pro Tips:
- Match the skimmer to your actual bioload, not just tank volume. The 200-INT is rated to 250 gallons under light bioload, but only 150 gallons under heavy load. A heavily stocked SPS or fish-only system at 200 gallons may push the skimmer harder than a lightly stocked mixed reef at the same volume. Size for what you actually keep.
- Use the cup drain daily. The collection cup drain makes it easy to empty skimmate without pulling the cup. Running a short piece of tubing from the drain to a waste container means you can empty the cup on a regular schedule without touching the skimmer, which keeps skimmate from overflowing back into the sump.
- Allow break-in time before judging performance. New acrylic skimmers and new pinwheel pumps typically take a few days to a week to stabilize foam production. The gate valve adjustment during break-in period requires patience — small changes have a large effect. Set it conservatively for the first week and dial in from there.
What's Included:
- Classic 200-INT skimmer body
- Aquatrance 3000s pinwheel pump
- Collection cup with drain
- Air silencer
Skimmer Specifications:
- SKU: CLSC-200INT
- Body Diameter: 8in
- Neck Size: 4.75in
- Total Height: 24in
- Footprint: 14.6 x 10.25in
- Output Size: 50mm / 1.5in PVC
- Output Height: 6.5in
- Recommended Sump Water Height: 7.5-8.5in
- Rated Aquarium Size: Up to 150 gallons (heavy bioload) / 200 gallons (medium) / 250 gallons (light)
- Construction: Solid cast acrylic
Pump Specifications (Aquatrance 3000s):
- Pump: Reef Octopus Aquatrance 3000s pinwheel
- Wattage: 35w
- Air Draw: 900lph / 31.5 SCFH*
- Water Draw: 800lph / 211gph*
WARRANTY
CoralVue, Inc. hereby guarantees this product to be free from defects in material and workmanship for a period of:
- 90-days
- Warranty is activated on the date of purchase.
This Standard Limited Warranty applies and is limited as follows:
- To the product only as long as it remains in the possession of the original purchaser.
- To the product that has not been subject to accident, misuse or abuse.
- To the product that has not been modified, altered, defaced, or had repairs made or attempted by other than CoralVue, Inc.
- That CoralVue be immediately notified in writing within ten (10) days of first knowledge of defect by owner or his agent.
- That CoralVue, Inc. shall be given first opportunity to make any repairs, replacements or corrections to the defective construction within a reasonable period of time.
- Under no circumstances shall CoralVue and/or the Manufacturer be liable by virtue of this warranty or otherwise for damage to any person or property whatsoever for any special, indirect, secondary or consequential damages of any nature however arising out of the use or inability to use because of the product defect.
Instructions:
- Confirm your sump skimmer chamber has at least 7.5in of water depth and no more than 8.5in. Water height outside this range will significantly affect skimmer performance.
- Place the Classic 200-INT in the skimmer chamber. The footprint is 14.6 x 10.25in — confirm clearance before lowering the skimmer into position.
- Connect the Aquatrance 3000s pump to the skimmer body via the o-ring sealed union pump mount. Hand-tighten the union until seated and sealed.
- Connect the airline to the air silencer mount.
- Plug the pump into a grounded outlet or controller. For overflow protection, consider connecting through a delay timer or the Reef Octopus OCT-WC100 waste collector (available separately).
- Power on the pump. The skimmer will begin producing foam. Initial foam may be excessive and watery during the break-in period — this is normal.
- Adjust the gate valve to control water level inside the skimmer body. Raise the water level to produce wetter, lighter skimmate; lower it for drier, darker skimmate. Make small adjustments and allow 30 minutes between changes for the foam level to stabilize.
- Allow 3-7 days of operation before making final gate valve adjustments. New skimmers and pumps require break-in time to reach stable performance.
- To empty the collection cup, connect a short length of tubing to the cup drain and route it to a waste container. The cup can also be removed via the quick-release neck for manual emptying.
- For pump removal and maintenance, unscrew the union pump mount, pull the pump free, and clean the impeller and pump housing as needed.