Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria
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 10-07-2003, 12:20 AM   #1
Aquarium Advice Regular
 
Join Date: Sep 2003
Location: San Jose, Ca
Posts: 64
Overflow Question??

Okay, so I've decided to go reef rather than fish only. I would like to put a wet/ dry filter/ sump/ protein skimmer below the tank. The problem is, I've only got a two inch clearance behind the tank. Just enough room for the Fluval (304) hoses to fit. I'd like to add an over flow to feed a sump but the room just isnt there. I'm not terrible excited about the prospect of draining and lugging the tank out a couple inches. My question is, Is there a way to supply the sump with water besides going with the overflow? Is it possible to siphon directly from the tank to the sump using a ball valve to control flow? I imagine that I could fabricate a half an overflow in the tank and have a sump large enough to handle the excess in case the return pump failed. Any help or suggestions would be greatly appreciated.l

Thanks in advance,
Calvin
__________________

__________________
Calvin is offline   Reply With Quote
Old 10-07-2003, 01:13 AM   #2
Aquarium Advice Addict
 
Join Date: Jun 2003
Location: Earth
Posts: 1,227
how about using a siphon box overflow off the side of your tank, rather than the back?

either that, or drain that tank down and budge it out a few more inches!

you cannot siphon water out one tank into another without controlling the air pressure in one of the two tanks... without controlling the air pressure, the siphon will operate unpredictablly, even if you put a valve on it.

example:

you start a siphon to supply your sump, and you adjust a valve so that the return pump appears to be pumping water out as fast as it's coming in....

scenario a> your siphon is actually running a hair slower than the pump, and the pump drains your sump at 3:45AM and you are awoken to awful noise of pump running dry, or it has run dry and burned out, or shut down and will restart when it cools off.

scenario b> your siphon is actually running a hair faster than the pump, and while you're stuck in a traffic jam after work, your sump has overflowed and is draining your tank onto the floor.

scenario c> you build a sump large enough to handle enough water from the tank to break the siphon ... but now your return pump will dutifully return all that water, plus the water in the sump itself to the tank, and then procede to run dry as the siphon is broken and can no longer drain the tank

none of these are very good! so I'd recommend using a side of your tank for the overflow, or moving it off the wall some more... maybe some applicance moving equipment would be of assitance

HTH
__________________

__________________
justDIY is offline   Reply With Quote
Old 10-07-2003, 01:26 AM   #3
AA Team Emeritus
 
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
I agree 100%. Not using an overflow is not an option.
__________________
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Logan J
loganj is offline   Reply With Quote
Old 10-07-2003, 02:16 AM   #4
Aquarium Advice Regular
 
Join Date: Sep 2003
Location: San Jose, Ca
Posts: 64
Is it possible to fabricate am elongated overflow box? One that is longer rather then wider? If not, looks like I'm moving the tank this weekend.
__________________
Calvin is offline   Reply With Quote
Old 10-07-2003, 02:44 AM   #5
AA Team Emeritus
 
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
You can make the overflow any size you want to, but... (Why does there always have to be a "but"?!) What you're going to run into is having enough clearance to install the drain pipes in the bottom of the external box. If you have 2" of clearance, then you'll be limited to a box that's about 1 3/4" front to back. Figure the acrylic is at least 1/4" so you've lost another 1/2" due to the front and back walls of the box. That only leaves you with 1 1/4" to install the drains. I don't think you could wedge anything more than a 3/4" fitting in there. Possible you could use two 3/4" drains and have the siphon tube come in between them. I think this will really limit the flow rating of the overflow though. It'll be really hard to get in there to tighten the fittings no matter what size they are as well. My advice is to scoot the tank out so you can use a larger external box.
__________________
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Logan J
loganj is offline   Reply With Quote
Old 10-07-2003, 03:19 AM   #6
Aquarium Advice Regular
 
Join Date: Sep 2003
Location: San Jose, Ca
Posts: 64
Thank you for your advice. You bring up many points I hadnt considered. Your help has probabaly saved my tank and carpet.
__________________
Calvin is offline   Reply With Quote
Old 10-07-2003, 03:30 PM   #7
Aquarium Advice Regular
 
Join Date: Apr 2003
Location: Flint,Texas
Posts: 84
Calvin,
I had the same problem as you - only 2" of clearance, needed around 3 1/2" minimum for the Lifereef slimline overflow.

Solution? Simply move the tank out a couple inches.
Again my tank is 90 gallon, like yours, weight about a zillion tons when full!, but a long piece of 2x4 as a lever along with a piece of smooth wood to prevent gouging the wall with the lever and VERY CAREFULLY inching it out allowing the frame to settle before inching further..... and it worked fine!!!
My stand is on hardwood floor, might not be so easy on carpet but I'd definitely give it a try if it were mine...

Andy.
__________________
AndySmithers is offline   Reply With Quote
Old 10-07-2003, 03:40 PM   #8
AA Team Emeritus
 
Join Date: Dec 2002
Location: Raymond, NH
Posts: 916
Quote:
I agree 100%. Not using an overflow is not an option.
True, if the holes are drilled in the bottom of the tank. However, our current tank is our 8th reef tank in the last 13-14 years, and we've never once used overflows. Our tank is a 180g, which is plumbed to a basement sump/refugium/prop tank.

The tank is drilled w/3 bulkheads (no overflows) - holes sit at about 4" from the tank's surface. If the power fails, all the water that could potentially drain from the tank can be held in the sump.

Pics of our setup here: http://home.comcast.net/~76fxe/sump.htm

FWIW, I would not use a wet dry if you're considering a reef tank. Protein skimmer, LR, DSB should be your total filtration "package".

HTH,
ReefLady is offline   Reply With Quote
Old 10-07-2003, 04:42 PM   #9
Guest
 
Posts: n/a
Teri,

Can you elaborate on how you equalize the flow in your tank to keep the water above the bulkheads? They seem to be a lot lower than the water line....

A little confusing to me, because you are not using a closed loop system.
__________________
  Reply With Quote
Old 10-07-2003, 04:44 PM   #10
AA Team Emeritus
 
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
Very true Teri...I didn't mention drilling the tank as I didn't think it would be a viable option in this case. I have used tanks drilled like yours and they do work very well.
I agree on the wet/dry as well. They are really best suited for FO tanks where there is no other solution for biofiltration.
__________________

__________________
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Logan J
loganj is offline   Reply With Quote
Reply

Tags
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
overflow question Mikebaker Saltwater & Reef - Getting Started 7 12-19-2005 02:09 PM
Overflow question.... nickthapainter Saltwater & Reef - Getting Started 5 02-20-2005 01:20 AM
overflow question iwantareef16 DIY Projects 1 01-04-2005 05:42 PM
Question on Overflow... MattP725 Saltwater Reef Aquaria 6 10-06-2004 03:40 PM
Overflow question easyian Saltwater & Reef - Getting Started 10 11-15-2003 06:26 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 02:29 AM.


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