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 Specifications 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