Which diameter to use?

Sierra_Bravo

Valuable Member
View Badges
Joined
Jan 29, 2017
Messages
1,851
Reaction score
3,880
Location
San Antonio, TX
I have a 4' long 120g tank with a single 1" corner return line that I'd like to place a RFG on. Problem is that I probably am only pushing 300 gph through the sump and back into the display (I use a pair of XF250 Gyres for my main flow). What I'm trying to accomplish is breaking up the static linear flow I currently have from the return pipe and add a bit more turbulence to the other half of the tank opposite the return.

On a 4' tank at that low of flow, would you recommend I use the 1" RFG or reduce down to a 3/4"?
 

Vivid Creative Aquatics

Upgrade Your Flow!
View Badges
Joined
Oct 12, 2017
Messages
852
Reaction score
1,028
Location
Phoenix, AZ
I have a 4' long 120g tank with a single 1" corner return line that I'd like to place a RFG on. Problem is that I probably am only pushing 300 gph through the sump and back into the display (I use a pair of XF250 Gyres for my main flow). What I'm trying to accomplish is breaking up the static linear flow I currently have from the return pipe and add a bit more turbulence to the other half of the tank opposite the return.

On a 4' tank at that low of flow, would you recommend I use the 1" RFG or reduce down to a 3/4"?
For that low of a flow, i would definitely reduce it down to the 3/4in or possible even the 1/2n. The 1/2in will likely give you a stronger flow pattern at 300GPH than the 3/4in would.

Give me a few minutes and I'll shoot a quick video showing the two nozzles at 300 GPH.
 

Vivid Creative Aquatics

Upgrade Your Flow!
View Badges
Joined
Oct 12, 2017
Messages
852
Reaction score
1,028
Location
Phoenix, AZ
@Sierra_Bravo - here's a quick video of the 3/4in RFG and the 1/2in RFG at approx 300 GPH.
As usual, i pumped air into the return line so you could actually see the flow the nozzle is creating.
https://www.reef2reef.com/members/sierra_bravo.77970/
At around 300 GPH. it looks to be that the 1/2inm RFG is going to create a more disruptive flow than the 3/4in would, which is what i think you're after.

Take a look - hopefully the video helps you answer your question.



 
OP
Sierra_Bravo

Sierra_Bravo

Valuable Member
View Badges
Joined
Jan 29, 2017
Messages
1,851
Reaction score
3,880
Location
San Antonio, TX
You stopped whatever you were doing and created a video to answer my specific question? If that isn't incredible customer service I don't know what is. I'm impressed - thanks for that.

I'll get a solid measurement on my return volume and make a decision from there. I actually hope my flow is higher than my estimate so I don't have to reduce all the way down to 1/2". If I manage to get somewhere in between those two flow patterns you showed I'd be happy.

Thanks for your help!
 

mta_morrow

Of course I have room for 1 more fish!
View Badges
Joined
Sep 15, 2015
Messages
7,191
Reaction score
29,519
Location
Hilton Head
I was happy when I asked them a question yesterday via their site and got an answer very quickly. I then placed my order. Now that I see what they did for you, I’m even happier! Keep up the good work VCA! And the great products.
 

Vivid Creative Aquatics

Upgrade Your Flow!
View Badges
Joined
Oct 12, 2017
Messages
852
Reaction score
1,028
Location
Phoenix, AZ
You stopped whatever you were doing and created a video to answer my specific question? If that isn't incredible customer service I don't know what is. I'm impressed - thanks for that.

No problem - I have our Demo Tank setup here in the office, so it's pretty easy to grab videos like this. I can demo an RFG from as little as 100 GPH to as much as 800-900 GPH in this tank - so if you need to see another GPH - just post your request here. :)
 

Vivid Creative Aquatics

Upgrade Your Flow!
View Badges
Joined
Oct 12, 2017
Messages
852
Reaction score
1,028
Location
Phoenix, AZ
I've established my flow at ~430 gph. I went ahead and ordered the 3/4" version as it will accomplish what I'm looking for. Thanks for your help.
We'll get that shipped out to you on Monday. Should be in your mailbox in about 3 days.
Thank you!
 

So what do you think about running carbon as a filter for your aquariums?

  • Underrated

    Votes: 9 14.5%
  • Overrated

    Votes: 9 14.5%
  • Just Right

    Votes: 44 71.0%

Online statistics

Members online
2,342
Guests online
5,887
Total visitors
8,229
First Choice
Top