Random Flow Generators: How many of you use them?

BRS

How many of you are using or have used a VCA Random Flow Generator?

  • I currently am using them

    Votes: 222 36.4%
  • I have used them in the past

    Votes: 42 6.9%
  • I have never used them

    Votes: 235 38.5%
  • I am just now learning about them

    Votes: 92 15.1%
  • Other (please explain)

    Votes: 19 3.1%

  • Total voters
    610

revhtree

Owner Administrator
View Badges
Marketplace Rating
100
Joined
May 8, 2006
Messages
42,388
Reaction score
64,054
These Random Flow Generators from Vivid Creative Aquatics are so affordable and effective I thought they deserved a QOTD feature! Plus we can talk about other ways to get random flow!

What are they? This is from the VCA website: "The Random Flow Generator® Nozzle. by Vivid Creative Aquatics can dramatically change the way water moves around your aquarium. With the RFG Nozzle you can produce a more natural flow pattern while also simplifying your flow solution. The RFG has not moving parts, which means it is reliable and durable in the harsh environmental conditions inside your reef tanks."

So let's talk about them and your experience!

1. How many of you are using or have used a VCA Random Flow Generator and what are your thoughts on them?

2. What other ways have you been able to accomplish "random flow" in your reef aquarium?

RFG075_2-pack.jpg
 

NeonRabbit221B

Valuable Member
View Badges
Joined
Jun 21, 2019
Messages
2,344
Reaction score
4,568
Location
Harrisonburg, Va
I would reach out to a 3rd party with a 3D printer who can print the original design of the RFG... I do suggest anyone with an AIO that wants to avoid cluttered powerheads in the display check them out! High flow rates work much better on these so it may be best to use 1 outlet rather than a Y outlet.
 

Paul B

10K Club member
View Badges
Joined
Nov 3, 2010
Messages
13,559
Reaction score
40,188
Location
Long Island NY
I never used one and like many things in this hobby feel it is un necessary and maybe even detrimental. I am not the God of random flow but I have been SCUBA almost since Cousteau invented the thing.
In most places in the sea the flow is in one direction except in very shallow water near the surf.
If you have dove in many places in the Caribbean, the flow goes one way. It certainly does not change every second. The tide in the tropics is very small so it hardly affects flow and if it did, like here in the North the water only changes direction every 6 hours so every 6 hours I reveres my powerheads. :rolleyes:

I think a stronger flow in one direction is better. I have powerheads on opposite ends of my 6' long tank and when the flow merges in the center of the tank it makes a random flow. The fish that like that, can live there if they like. I can see it being more valuable in a small tank or spawning tank.
Just my opinion of course (Sorry people who make the device)
 

lpsouth1978

Valuable Member
View Badges
Joined
Aug 7, 2019
Messages
1,390
Reaction score
1,925
Location
Queen Creek
I have used them in the past with limited success due to slower flow. I am currently using them on my new build in hopes of eliminating powerheads in the tank. This system will have several anemones (BTA and Haddoni) so I am trying to eliminate powerheads. Flow through the sump will be higher than typical, but I think it will work well.
 

Nano925

Active Member
View Badges
Joined
Jan 7, 2021
Messages
259
Reaction score
721
Location
california
I have a pair on my Evo 13.5 with sicce 0.5 (185GPH)return pump. I’m more towards the minimum flow rate for 2. I too am trying to eliminate power heads and seem happy for now. I have on pointed to the surface and do see a change in the flow. Hope this helps!
 

Attachments

  • D4AA8506-AB62-4498-8744-D1725A8E7F5F.jpeg
    D4AA8506-AB62-4498-8744-D1725A8E7F5F.jpeg
    111.6 KB · Views: 246

Oldsman

Active Member
View Badges
Joined
Jul 31, 2020
Messages
191
Reaction score
268
Location
New York
I have one on our biocube 32, thought it looked interesting but haven't been blown away by it. I'm running the stock return pump, w a hydor nano ph getting a decent cross current now .
 

PR_nano

Well-Known Member
View Badges
Joined
Jul 27, 2019
Messages
624
Reaction score
609
Location
Orlando, FL
I bought a pair to replace the IM spin-steam that came with my tank. The spin-steam have a few moving parts and get stuck from time to time. I figure I would try these out but still have them sealed in their package...
 

NeonRabbit221B

Valuable Member
View Badges
Joined
Jun 21, 2019
Messages
2,344
Reaction score
4,568
Location
Harrisonburg, Va
I have a pair on my Evo 13.5 with sicce 0.5 (185GPH)return pump. I’m more towards the minimum flow rate for 2. I too am trying to eliminate power heads and seem happy for now. I have on pointed to the surface and do see a change in the flow. Hope this helps!
I use the Sicce 1.0. I guess the additional flow helps as I can water the polyps move.
 

Midrats

Valuable Member
View Badges
Joined
Jul 16, 2015
Messages
1,327
Reaction score
1,335
Location
Madison
I used one on an old Reefer Nano tank as the sole source of flow and it worked well. I had a Tunze 1073.050 running at full whack and you could see the flow swirling around. At lower speeds, the action is much less pronounced. On my current set up I prefer much less turnover in the sump so the RFG is shelved for now.
 

Uncle99

2500 Club Member
View Badges
Joined
Jul 22, 2018
Messages
3,125
Reaction score
3,477
Location
Province of Ontario
All my wave makers come with random flow settings.
I also use manual timers to turn off certain flows completely like at feeding times. I also use these to create a “night” mode, 10x instead of 40-50x turnover, so my fish have some peace.

I think random flow is crucial for my tanks success as the variable flows patterns intersect at different points and constantly keep that detritus in all areas of the tank up in the column for export.

The ever changing flows look great on corals.
 

sp1187

The Great Enabler
View Badges
Joined
Aug 4, 2017
Messages
5,511
Reaction score
26,108
Location
Grand Blanc MI
1. How many of you are using or have used a VCA Random Flow Generator and what are your thoughts on them?

never used them.

2. What other ways have you been able to accomplish "random flow" in your reef aquarium?


DC return and Gyres
and yes, Mr. B is correct about the currents going one way in real life.... except that one time I was diving in the Bahama's at sixty feet and the storm surge was so bad the sea fans were rocking and rolling back and forth.
which meant I too was rocking back and forth. and since I are susceptible to motion sickness the fish got fed.;Vomit
 

NeonRabbit221B

Valuable Member
View Badges
Joined
Jun 21, 2019
Messages
2,344
Reaction score
4,568
Location
Harrisonburg, Va
I started off with the 1.0 then switched to the 0.5 because for my aqua scape it was too much flow. Now I am thinking of going back because I’m not sure I’m getting proper flow.

MJ1200 also worked for me when they were being made. Ran single RFG for a while and might go back to it.
 

Joshthebox

Active Member
View Badges
Joined
May 8, 2019
Messages
114
Reaction score
174
Location
Ontario
Personally I think they're a gimmick (I've used them before as well). They might do something small, but I'd rather invest money into powerheads than rely on my return for the main flow in the tank. They're not like eductors or anything of that nature (which are great).
 
BRS

BIG TANKS VERSUS SMALLER TANKS...WHICH DO YOU PREFER?

  • BIGGER

    Votes: 718 75.7%
  • smaller

    Votes: 181 19.1%
  • Other (please explain)

    Votes: 50 5.3%

Online statistics

Members online
985
Guests online
3,248
Total visitors
4,233
AFX
Top