Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater & Reef - Getting Started
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 12-03-2014, 06:24 AM   #1
Aquarium Advice Apprentice
 
andy281's Avatar
 
Join Date: Apr 2014
Location: NEW YORK
Posts: 36
Help with overflow box

I have a 55 Gallon FOWLR tank that i have had set up for around 4 months. I did all the pluming to the sump myself with PVC. My problem is my overflow box canít keep up with my return pump. If i open the valve on the return pump outlet hose all the way open the water level rises quickly to the top of the tank and will overflow if I were to let it. I only have two elbows in my drain line to the sump. I have been running the tank with the valve about 40% closed on the return pump matching the amount of water that drains to the sumo with the amount of water the pump returns. My overflow box is rated at 800 GPH and my return pump is rated at 700GPH. Iím confused because the head pressure should slow my return pump down even more yet i still have to dial it back. I have the overflow box adjusted all the way down to the lowest water level. Any suggestions Iím ready to add a second overflow box but I really donít want to or see how I would need to. I just want to be able to run my return pump wide open to maximize the flow rate.

__________________

__________________
andy281 is offline   Reply With Quote
Old 12-03-2014, 12:57 PM   #2
Giant Clam Addict
Community Admin
 
Sniperhank's Avatar



POTM Champion
 
Join Date: Nov 2011
Location: Summerville, Pennsylvania
Posts: 18,543
It sounds like it is just fine. There are 2 elbows, most likely 90 degrees. There is an amount of headloss that isn't being considered here. As long as you have a ball valve to turn on the return side of your powerhead to restrict the flow you'll be fine. I don't know of anyone that runs their return pump without being restricted in such a manner.
__________________

Sniperhank is offline   Reply With Quote
Old 12-03-2014, 05:27 PM   #3
Aquarium Advice Addict
 
Dav3's Avatar
 
Join Date: Jul 2012
Location: California
Posts: 1,233
What type of overflow are you using?
__________________
Dav3 is offline   Reply With Quote
Old 12-05-2014, 04:09 AM   #4
Aquarium Advice Apprentice
 
andy281's Avatar
 
Join Date: Apr 2014
Location: NEW YORK
Posts: 36
Quote:
Originally Posted by Dav3 View Post
What type of overflow are you using?

Eshopps PF-800


Sent from my iPhone using Aquarium Advice
__________________
andy281 is offline   Reply With Quote
Old 12-05-2014, 12:07 PM   #5
Aquarium Advice Addict
 
Dav3's Avatar
 
Join Date: Jul 2012
Location: California
Posts: 1,233
Is there some air trapped in the utube? If so, this can can slow the flow through.

Sounds like maybe the return pump is undersized and you aren't pushing enough water through to flush the air out.
__________________
Dav3 is offline   Reply With Quote
Old 12-05-2014, 01:13 PM   #6
Aquarium Advice Addict
 
Dav3's Avatar
 
Join Date: Jul 2012
Location: California
Posts: 1,233
Have you used any headloss calculators to determine the aprox flow rate of the return at the display?

What is your return pump and what is the return plumbing? PVC or flex tube? Diameter? Vertical distance between pump and top of tank?
__________________
Dav3 is offline   Reply With Quote
Old 12-05-2014, 01:19 PM   #7
Aquarium Advice Activist
 
lstimpy's Avatar
 
Join Date: Jan 2014
Location: Wesley Chapel, FL
Posts: 197
Try putting another U tube from the tank to the overflow box.


Sent from my iPad using Aquarium Advice
__________________
lstimpy is offline   Reply With Quote
Old 12-05-2014, 01:20 PM   #8
Aquarium Advice Activist
 
lstimpy's Avatar
 
Join Date: Jan 2014
Location: Wesley Chapel, FL
Posts: 197
Meaning two U tubes


Sent from my iPad using Aquarium Advice
__________________
lstimpy is offline   Reply With Quote
Old 12-05-2014, 01:24 PM   #9
Aquarium Advice Addict
 
Dav3's Avatar
 
Join Date: Jul 2012
Location: California
Posts: 1,233
If the pump is undersized, adding another utube won't help.
__________________
Dav3 is offline   Reply With Quote
Old 12-05-2014, 06:08 PM   #10
Aquarium Advice Apprentice
 
andy281's Avatar
 
Join Date: Apr 2014
Location: NEW YORK
Posts: 36
The pump is not undersized it's rated at 700 gph any my overflow Is rated at 800 gph my problem, is I want to open the valve on my return pump more but my overflow box isn't keeping up. If anything my pump is oversized I have to keep it dialed back to keep my tank from over flowing.


Aquatic-Airman
__________________

__________________
andy281 is offline   Reply With Quote
Reply

Tags
flow, overflow, overflow box

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
overflow box... help! mike3epanda General Hardware/Equipment Discussion 0 07-29-2007 02:28 PM
HOB overflow Box Vs. Internal overflow box FishFrik Saltwater Reef Aquaria 8 09-10-2006 12:36 AM
please help my external overflow box to get flowing pelochas General Hardware/Equipment Discussion 4 09-20-2005 12:54 PM
Whats the difference between out box and sent box? Melody Forum Admin & Announcements 2 05-31-2005 12:53 PM
Please help me with my overflow box itzafugasi Saltwater & Reef - Getting Started 6 08-22-2004 05:57 PM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 05:24 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.