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Fragtastic Reef is a REAL store with REAL Customer Service. Shopping online can be frustrating not knowing who is selling out of their basement or garage. Fragtastic Reef is one of the very few REAL fish stores that also sells online, and has a FULL Brick and Motar Retail Store! We not only have a full retail location but also a warehouse with massive selection of inventory in stock, and you can even pickup at our retail location.

Most products on our website are in stock and shipped by us from our retail location.

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Reef Octopus Stackable Neck Extensions

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Product Description

These extensions are designed to extent the neck of Reef Octopus skimmer to achieve greater improvements in filtration and refined control. By adding onto the length of your skimmers neck you increase dwell time achieving greater contact time with dissolved organics and allow for higher internal water height settings. This is an easy way to upgrade the performance of an existing Reef Octopus skimmer without having to purchase a new skimmer.

NOTE: The "Twist & Lock" extensions for the Elite and Prime skimmers are white pvc and& the traditional o-ring extensions are only available in black acrylic.

Neck Extension sizes and models available:

Fits Reef Octopus Skimmer Models

  • NK-110 (2in): CLSC-110(int/ext), SRO-1000int, XP-1000int, XP-1000ext, NWB-110, DNW-110
  • NK-150 (2in): CLSC-150(int/ext), Regal 150(int/sss), SRO-2000int, SRO-1000ext, NWB-150, DNW-150, POV-DC1, Diablo DCS-150int
  • NK-160 (3in): CLSC-160, DDNWB-150, XS160(Extreme-Diablo)
  • NK-170 (3in): SRO-2000ext, XP-2000int, SSS-1000int, XP-1000sss, Diablo DCS-170, Regal 170(int,sss,ext)
  • NK-200 (3in): CLSC-200(int/ext), CLSC-202, CLSC-225, Regal 200(int/sss/ext), Regal 220(int/sss/ext), SRO3000(int/ext), XP2000(sss/ext), NWB/DNWB200, XP3000(int/ext/sss), XS200(Extreme/Diablo), Diablo XS225, Diablo DCS200(int/ext), POV-DC2 & DC3
  • NK-250 (3in): Regal 250(int/sss/ext), SRO-5000(int/ext/sss), DDNWB250, XP5000(int/ext), Diablo XS250, Diablo DCS-250(int/ext)
  • NK-300 (3.5in)Regal 300(int/sss/ext), SRO-6000ext, TDNWB300, XS300 (Extreme/Diablo), XS350 (Extreme/Diablo), Diablo DCS 300(int/ext)
  • NK-150-TL (2in)Prime 150int, Elite 150(int/sss)
  • NK-200-TL (3in)Prime 200int, Elite 200(int/sss), Elite 220(int/ sss)
  • NK-6000: SRO-6000(int/sss)
  • NK-XP8000 (3.5in)XP8000(int/sss/ext)
  • NK-7-8000 (3.5in)SRO 7000ext, SRO 8000ext (Special Order Only)
  • NK-9000ext (3.5in)SRO 9000ext (Special Order Only)


Product Reviews

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  1. Great way to boost efficiency!

    Posted by Brian on Oct 4th 2019

    These things are awesome! I added 7" to my Regal 300 (2 neck extensions). It's pulling nice black sludge. I'm planning on upgrading my tank so was looking for a way to boost the capacity of my skimmer since it's already the biggest one Reef Octopus makes! Fragtastic Reef was also great to work with since the item was backordered but it shipped right when they said it would.


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Product Warranty

EVERY ITEM WE SELL IS BRAND NEW & COMES WITH A FULL MANUFACTURE WARRANTY! We do not sell used, defective, or returned product to our customers. Only exception to this is in our clearance and open box section of our website. Even those items still include a full warranty, and are usually an amazing deal if your looking to save money!

Most brands and products we sell have typically a 1 year warranty, with some products having up to 3 or more years. If you have any questions on warranties you can check the manufacture website or just contact us with any questions. At we sell only the best products, and only products we recommend and use ourselves, so you can buy with confidence.

We are an authorized dealer and retail partner for every brand we sell!

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