Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 05-13-2008, 02:20 PM   #11
AA Team Emeritus
Ziggy953's Avatar

POTM Champion
Tank of the Month Award
Join Date: Feb 2006
Location: Owings Mills, Maryland
Posts: 9,101
The reason your tank is nearly overflowing is because you are restricting the drain by using the 3/4 pipe. You will not have the problems you are seeing if you change out your drain line to 1" pipe.

Your drain line does a 90 turn (last pic in your first post) the horizontal part of that pipe is it level, angled down or angled up slightly. If it is slightly angled up it will restrict the downward flow of your drain line. Remeber that your drain line depends on gravity to work as well, not just the pump pushing the water into the tank and then into the overflow.

If you add another U tube to your current setup you will overflow your overflow box. You need to change out your 3/4 pipe to 1". After you do that add the second U Tube if you want but it will not change the amount of water that can flow down the pipe attached to the bottom of your overflow box.

Ziggy953 is offline   Reply With Quote
Old 05-13-2008, 09:55 PM   #12
Aquarium Advice Addict
fijiwigi's Avatar
Join Date: Sep 2007
Location: Eastern Washington
Posts: 1,726
Originally Posted by cccapt View Post
That doesn't make sense. The diameter of the drain line doesn't change, so how can the amount of water it can drain change? What is the diameter of the u-tube and what size is the actual drain line. FYI, a 3/4" line will only drain about 300 gph.
Check out this drain/overflow calculator.
My drain line is 1" I thought you were referring to the return line. Now I understand what you were meaning thanks


120G Oscar tank in progress
fijiwigi is offline   Reply With Quote

flow, overflow

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
water flow issue. reefbound Saltwater Reef Aquaria 2 03-23-2006 11:57 AM
Power Compact heat issue on overflow tubes????? Poppy828 Saltwater Reef Aquaria 3 01-07-2005 12:47 AM
Food blocks causing increased water hardness? shaela21 Freshwater & Brackish - General Discussion 5 08-09-2004 08:08 AM
Mega-flow overflow and Microbubbles doughboydj Saltwater Reef Aquaria 14 07-15-2004 12:57 AM
Overflow Cup Issue Gauge Saltwater & Reef - Getting Started 1 08-18-2003 11:13 AM

» Photo Contest Winners

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 04:34 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.