VCA Fluval Evo Edition - 14" RFG Nozzle with Fluval Evo Adapter

Details

Flow recommendations
The 1/4 RFG Nozzle is designed for small 5-gallon or less Nano and Pico aquariums. The "Optimal" GPH recommendation a a suggested flow rate, so we encourage you to experiment

Model	Suggested Minimum GPH	Optimal GPH	MAX GPH
Single 1/4in RFG (RFG025 )	80-100	120-140	225

Installation

The 1/4in RFG withe Fluval Spec V/Evo is easy to install. Simply remove the stock nozzle assembly and the inlcuded 13mm adapter slip-fits right onto the existing pipe.

Remove Stock Nozzle
Assemble the 1/4in RFG to the Adapter
Press the Nozzle/adapter assembly onto the pipe that protrudes out from the back wall, while supporting the elbow behind the back wall with your other hand.
Adjust the angle of the nozzle and or rotate the adapter to enure the nozzle sits below the water line.

Randomizer
The 5 internal fins form a set of spiraling channels. As the water flows through the nozzle, the channels draw the stream of water in one direction or the other. The small amount of interference at the base of the Eductor causes the stream to randomly change direction as it exits the nozzle.

Eductor
Draws in additional water volume

Easy-Snap Fitting
Snaps onto a standard loc-line fitting with ease. No tool required.

What’s the purpose of the RFG Nozzle
The RFG Nozzle is designed to provide a more random flow pattern in your aquarium. Instead of just producing a laminar flow pattern like most aquarium nozzles, the unique internal shape of the RFG Nozzle causes the water flow to randomly change direction as it exits the nozzle.

Does it rotate or have any moving parts?
No – the RFG design has no moving parts . This means you can enjoy the random flow pattern without having to worry about internal gears or parts getting stuck or worn out.

How does it work?
The random motion of the flow created by the RFG nozzle is accomplished through fluid dynamics. There are no moving parts. The internal structure is made up of a helix of spiraling fins that run nearly the entire length of the nozzle.When water moves though the nozzle it creates an accelerated stream of flow that passes through the center of the nozzle. This stream acts like a solid rod that isolates the fins, forming a set of internal channels.Each channel is connected to its own educator at the base of the nozzle and draws in additional water. When one of these channels draws in a little more water than the others, it becomes the dominant channel.The dominant channel then bends the center stream into that channel, causing the bulk of the water moving through the nozzle to exit through that one channel for a short period of time, until the next channel because dominant.This process repeats itself over and over, as long as water is moving through the nozzle. The end result is a nozzle that can vary the intensity and direction of the stream of water exiting the nozzle creating a more natural, randomized flow pattern.

How much flow does the RFG need?
The RFG nozzle will create a random flow pattern at just about any flow rate, but because of the way it works it does defuse the flow to some extent. Becuase of this, we have our minimum flow rate recommendations and what we call our “optimal” flow rates for the 1/2in, 3/4in and 1in RFG Nozzles.Our optimal recommendations produce what we feel is a good balance between the total GPH supplied to the nozzle and intensity and rate at which the nozzle changes the stream direction. The RFG Nozzle will handle far more flow than than the “Optimal” recommendations, so we encourage you to experiment and test the limits of the RFG Nozzles.

Model	Suggested Minimum GPH	Optimal Recommended GPH
Single 3/4in RFG (RFG075)	180-200	420-500
Two 3/4in RFGs (RFG075)	400-500	700-800
Single 1/2in RFG (RFG050 )	120-150	300-450
Two 1/2in RFGs (RFG050)	250-400	640-670
Single 1in RFG (RFG100)	320-400	720-1000

How do you install the RFG Nozzle?
Easy – the 1/2in and 3/4in RFG Nozzles sizes simply snap to the end of genuine Loc-Line branded modular hose. The RFG was specifically designed to easily attach while still maintaining a secure fit.

How do you use the RFG?
The RFG Nozzle is designed to produce a more random flow pattern than standard loc-line nozzles. This can be very beneficial to your reef aquarium. Corals tend to grow in more natural patterns when the flow passing over their branches is not laminar in nature. Use the RFG Nozzles on your main return lines or in a closed loop system. When supplied with at least 290 GHP, the nozzle begins to produce a randomly oscillating flow pattern. Use more than one RFG in your aquarium for even greater effect.

Is the RFG Nozzle like the other accelerator or vortex nozzles I’ve seen?

The RFG Nozzle’s represents a twist on an old idea with completely new results.The primary focus of the RFG is creating a random flow pattern, as opposed to accelerating the flow. This means you can crank up the flow on your return pump without blasting your coral or aquascape.The internal shape is very different from the standard accelerator nozzle that we all know. Instead, the RFG contains 5-vane internal helix that runs nearly the entire length of the nozzle and form a set of internal channels. Each channel is connected to an eductor at the base of the nozzle.This internal spiral, together with the eductors, contributes to the distinctive water moving properties of the RFG Nozzle. The old school accelerator and vortex nozzles simply can’t create the type of water movement the RFG is capable of.

Reviews

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VCA Fluval Evo Edition - 14" RFG Nozzle with Fluval Evo Adapter