Ultimate Return Line Upgrade Kit – Dual 1/2 Flex-Series RFG

Red Sea Reefer™ Compatible

Plus, many other aquariums using the included Multidapter™ Universal Pipe Adapter

Kit Includes:

  • The Patented Random Flow Generator® Nozzles
    2 x 1/2in Flex-Series Random Flow Generator® Nozzles – RFG050-FLX
  • New Flex-Series Adapters
    25mm to 3/4in Pipe Adapter & the new 2530-075 Multidapter™
  • Genuine Loc-line
    3/4in to 1/2in Y Fitting and 4 Sections of genuine 1/2in Loc-Line

Includes the New Flex Series Random Flow Generator®

RFG-FLXExtremely Durable and Flexible Material
Manufactured with a reef-safe TPU (Thermoplastic Polyurethane)


11 in stock (can be backordered)

Ultimate Compatibility

The Ultimate Return Line Upgrade Kit is directly compatible with wide variety of aquarium brands and models, including the aquariums listed below

  • Red Sea Reefer™ (All models - recommended for the 525 and smaller)
  • Genuine 3/4in Loc-Line fittings (this includes most custom built aquariums)
  • Red Sea MAX (Return line)
  • CADE Reef Series Aquarium
  • 25mm Metric Pipe
  • 3/4in slip or threaded bulkheads
  • 3/4in Schl40 PVC pipe elbows and socket fittings
  • 1in Schl40 PVC pipe
  • Any bulkheads or pipe socket with 25mm to 30mm inner diameter
  • MarineCost
  • and more

Includes a Multidapter!

In addition to the 25mm Flex-Series pipe adapter. this kit also includes the new 2530-075 Multidapter™


Includes the Flex-Series Random Flow Generator ® Nozzle


RFG Flex Series Nozzle will fit genuine Loc-Line® brand modular hose but also adapt to fit other similar sized modular hose fittings.

The RFG Flex Series is directly compatible with a wider range of aquariums and modular hose designs.


Made with a strong, extremely durable and flexible material, the RFG Flex Series won’t crack, it can’t break and has superior durability.
It’s also extremely easy to clean, since most algae and bio films simply slide right off with minimal effort.

The Patented Random Flow-Generator® NozzleA Trusted Design

The RFG Flex Series maintains the patented design of the Random Flow Generator® Nozzle. The design continues to be trusted by aquarium hobbyists and aquatic industry users alike. The RFG Flex Series will build on this trust earned over the years by delivering a new level of durability, flexibility and an enhanced functionality.