Reef Octopus Classic 100 INT Protein Skimmer
RO-C100
The Reef Octopus Classic in-sump (INT) skimmers are built from high-quality cast acrylic and draw water directly from the sump, using Reef Octopus air-shredding Aquatrance pinwheel pumps for efficient organic...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
The Reef Octopus Classic in-sump (INT) skimmers are built from high-quality cast acrylic and draw water directly from the sump, using Reef Octopus air-shredding Aquatrance pinwheel pumps for efficient organic waste removal. Note that Reef Octopus does not produce a Classic 100-INT in-sump model; the Classic in-sump line consists of the 110-INT, 150-INT, and 200-INT, while the Classic 100 is offered only as a hang-on-back (100-HOB) unit. The closest in-sump equivalent for a smaller tank is the Classic 110-INT, rated for aquariums up to 130 gallons.
Build around the Reef Octopus Classic 100 INT Protein Skimmer.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from filtration. Most buyers reading this page should buy the middle column.
Reef Octopus WC-100 Waste Collector
Reef Octopus Classic 110 INT Protein SkimmerAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.