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Reef Octopus Classic 110EXT 4” Recirculating Protein Skimmer

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Reef Octopus Classic 110EXT 4” Recirculating Protein Skimmer

89% Recommend this to a friend (8 of 9)

SKU: 204064
$246.99
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Quick Overview


  • Manufacturer rated for tanks up to 125 gallons

  • BRS recommended for tanks up to 100 gallons

  • External protein skimmer powered by Hailea OTP 1000 pump with an improved venturi design and pinwheel impeller. Built with high quality acrylic. Wedge pipe output allows for more adjustment of the skimmer compared to ball valves. ½” clearance required to remove collection cup for easy cleaning.


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Previously Asked Questions

  • by Owen on November 24, 2013, @5:53 PM

    Is there a way that I can I increase the flow rate to 300 gph?

    Bulk Reef Supply Hi Owen,
    You can use a faster pump and then slow that pump down manually via a ball valve or something similar. You don't want to actually run more water threw the skimmer then recommended though. That will generally lead to reduced contact time, more escaped micro bubbles, and often an overflowing skimmer.

    Do you find this question helpful?  Yes   No

  • by Nicholas on March 25, 2014, @7:50 AM

    The dnw110 requires a 250 gph feed pump for external but I have a 243 gph feed pump. Will that be okay?

    Bulk Reef Supply Hi Nicholas,
    That would be just fine :-)

    Do you find this question helpful?  Yes   No

  • by Aaron on October 11, 2013, @2:43 PM

    What do I need to run external?

    Bulk Reef Supply Hi Aaron,
    You will still need a supply pump to supply water to the skimmer but if you want to physically set the skimmer in your sump, that isn't any issue at all.

    Do you find this question helpful?  Yes   No

  • by Nicholas on March 26, 2014, @10:58 AM

    Is this model the dnw or dnwb? I believe the dnwb is external and is this the internal one? Or are they both the same?

    Bulk Reef Supply Hi Nicholas, this particular model (the DNW110) is the DNWB series of skimmer. They are recirculating models of skimmers. Recirculating models can also be used externally if your space and equipment accommodates that, though that is just a side effect of the recirculating action of the skimmer :-)

    Do you find this question helpful?  Yes   No

  • by Chris Meyer on May 8, 2014, @11:12 AM

    I dont have a sump. I use a fluval 406 canister filter. How do I run water to this skimmer from my tank and then back to the tank?

    Bulk Reef Supply Hi Chris,
    Unfortunately you can't, at least not unless you find a way to put the skimmer up higher then your tank as recirculating skimmers drain back to the tank via gravity. For a sumpless system skimmer options will be basically limited to the hang on back skimmers like the BH series skimmers from Octopus:
    http://www.bulkreefsupply.com/protein-skimmers/reef-octopus-protein-skimmers/reef-octopus-needle-wheel-protein-skimmers.html

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Full Details

  • The Classic 110EXT skimmer requires a feed pump to feed water to the skimmer. The recommended maximum flow rating for this skimmer is 250GPH. These numbers are based on zero back pressure on the output plumbing. If you add 90° bends on the plumbing back to a sump you may need to back off the amount of water being feed through the skimmer. We recommend that you use a ball valve inline from your feed pump to the skimmer allowing you to control the water flow.
  • Reef Octopus 4" Recirculating Skimmer CLSC-110EXT
  • Dimensions: 10.5" x 6" x 22"
  • Manufacturer rates skimmer for tanks up to 125 gallons.
  • BRS Recommends this skimmer for tanks up to 100 gallons
  • Powered by 1 OTP 1000 pump at 250 GPH
  • High performance venturi air injection system
  • Modified cone neck design designed for easy transition of micro bubbles into cup
  • Requires a feed pump or plumbed from an overflow to inject water into skimmer
  • Can be in sump or external
  • Metric plumbing parts.
  • 1 year warranty on skimmer and pump

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Reviews

9 Items

  • This skimmer is Great By Reef Lover on 1/21/2015

    Great skimmer is great. Work as it supposed to. For everyone complaining about loose parts, there is a provided metric conversion fitting for a reason. The provided parts fit perfectly and can be extended by using normal hardware store pipe and fittings using the metric conversion fitting.
  • excellent skimmer!!! By Robert on 3/16/2014

    This skimmer is great. This is the third reef octopus skimmer I own and once again they hit the mark. Now if any of you are wondering why the pipes and fittings that come with the skimmer are lose when you put it together is because they are supposed to be glued together. That is the whole purpose of having a recirculating skimmer. If you didn't know that then you probably shouldn't be buying this product. Once again excellent skimmer not a single bad thing I can say about this skimmer. Thumbs up!!!!!
  • Odd pipe fitting, great skimmer By Crystal on 12/29/2013

    The pipes don't fit together as snug as regular schedule 40/80 pvc. This is a minor pain when setting it up because it tends to fall apart while you are attempting to get the pieces in place before gluing them. You do need a thicker application of glue than normal. I'm slightly worried about that long term as saltwater slowly eats away at the glue. If you've ever taken down a tank that has been up for 5+ years, and you give the fittings a good whack they'll come apart because of this, even though the pipes aren't leaking beforehand.
    As far as skimming, it works like a champ.
  • Very difficult to set up. By Lady A on 6/24/2013

    First, this is an external skimmer. I bought based on the fact it said it could be used either in or out of my sump. So after rearranging my wires to make room it barely fit. This is a skimmer that requires you to have a PVC cutter, PVC glue and Teflon tape. The pipes are loose and you have to use a lot of PVC glue to prevent leaks. Also I had to Teflon tape all the places where I had an o ring. That said it looks like and awesome skimmer and will see how it does after a few days.
  • Works Great By skimmer user on 4/3/2013

    The pipe fittings were a little loose, but nothing a generous application of PVC cement couldn't fix. Plastic pipe was thin walled and a bit challenging to cut since my normal cutter was squashing the pipe instead of cutting it. Assembly was easy although the directions were nothing to write home about. Was producing wet foam within 2 hours and good skimmate by the next day. Has been pulling tons of crap out of my system. Was able to install behind my refugium since there was no room in the sump.
  • High quality; easy to fine tune By David on 2/28/2013

    I got this because recirculating skimmers do not depend on the water level of a sump and my sump is a regular 20g aquarium with no partitions. It is perfect. Very easy to fine tune and efficient. skimmate globs in 2 days. It does require some glueing/assembly and it's a bit large. I'm not really sure where they got the 4" from.
  • Easy to install! By Plumber on 2/21/2013

    The exit return is long so you can cut it to length using virtually any cutting tool short of nail clippers. The parts fit together loosely because they are meant to be glued together once everything is fit to your tank. That's what you do with PVC.
  • great upgrade By James on 2/16/2013

    I upgraded to this from a nw110 when I installed a new fuge in my sump and needed to install the skimmer internally. Since it is more or less the same model I expected similar performance but this is at least twice as effective. The recirculating design produces a much thicker foam. The return pipe that came with it wasn't long enough for my install but it did come with a metric conversion fitting so I could use my own PVC.
  • Grossly over done By skimmer user on 2/9/2013

    This skimmers exit return is to long, the pipe coming out of the return is 16 inches long and all the parts fit together lose you would have to glue them together.

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