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1/2" Flex-Series Dual Ultimate Return Line Upgrade Kit - VCA

Vivid Creative Aquatics  |  SKU: 477821B


Transform the return line on your Red Sea Reefer in seconds! 


Vivid Creative Aquatics has combined their 3D printed adapters and patented Random Flow Generator Nozzles with genuine Loc-Line parts to provide you with an easy-to-install upgrade kit for many Red Sea Reefer aquariums, amongst many others (see list below).


  • Genuine LocLine fittings
  • Extremely durable and flexible material
  • 3D printed parts made from Reef-safe PETG plastic
  • Quick and easy installation


VCA RFG (Random Flow Generator) Nozzle


Vivid Creative Aquatics revolutionary design uses a set of 5 fins in a spiraling design that channels the water in from one direction at the base of the eductor and then out of the nozzle a different direction. The small amount of interference at the base of the eductor helps create a random change in the intake affecting the flows path exiting the nozzle. The new Flex Series of RFG nozzles are constructed of extremely durable and flexible reef-safe TPU (Thermoplastic Polyurethane), making them directly compatible with a wider range of aquariums and modular hose designs.


Broad Compatibility


The included adapters allow you to use this kit with a wide variety of aquariums. Compatible with all of the following:


  • Any genuine Loc-Line fittings
  • Most custom built aquariums
  • Red Sea Reefer Aquariums
  • Red Sea MAX (Return Line)
  • CADE Reef Series Aquariums
  • 25mm Metric pipe
  • 3/4" Slip or threaded bulkheads
  • 3/4" Schedule 40 PVC pipe elbow and socket fittings
  • 1" Schedule 40 PVC pipe
  • Any bulkheads or pipe socket with 25mm to 30mm inner diameter
  • MarineCost aquariums




  • Fits modular hose fittings from 19mm-21mm (0.75" - 0.86")
  • Suggested minimum flow: 350-400 GPH
  • Optimal flow: 650-750+ GPH


What's Included?


  • 2x 1/2" Flex Series RFG (Random Flow Generator) Nozzles
  • 1x 25mm to 3/4" Pipe Adapter
  • 1x 2530-075 Multiadapter
  • 1x 3/4" to 1/2" Genuine Loc-Line Y Fitting
  • 4x Sections of 1/2" Genuine Loc-Line
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