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

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 12-18-2004, 11:12 PM   #1
Aquarium Advice Freak
Join Date: Sep 2004
Location: Hawaii
Posts: 204
what is a closed loop?

in my endless research i have come across the term "closed loop". can someone explain what a closed loop system is and what are the advantages and disadvantages.

SW - 75 gal
Amiracle SL-350 Wet/Dry (no bio-balls)
AquaC EV-180 Skimmer w/Mag 7
2ea Maxi-Jet 1200 & 2ea Maxi-Jet 900 PH
Captive Purity Refractometer w/Calibrator
LCD Digital 250 W Titanium Heater
48in Coralife 4x65 watt PC
Won Pro Heat II
Tunz level alarm
Approx. 200lbs Sand (3-4" DSB)
RO/DI unit - 110 GPD

Please feel free to advise me!
guitarded is offline   Reply With Quote
Old 12-18-2004, 11:20 PM   #2
Aquarium Advice FINatic
Join Date: Dec 2004
Location: Rocky Mount VA
Posts: 943
Check out this other thread in the saltwater general questions. It is a current thread.


Hope this answers some of your questions.

Vote for AquariumAdvice

28gal bowfront
40lbs livesand(bag from LFS), 30lbs live rock(LR.com)
2 O. Clowns
1 peppermint shrimp, 5 red leg hermit crabs,
4 mexican turbo snails, 15 nassarius snails
ricordea mushroom, candy cane coral,
super color polyps, hairy mushrooms
bubble coral, hawiian feather duster
coralife lunar 2x65, HOT magnum canister
10 Gal refugium(chaeto) & seaclone skimmer
RMPD109 is offline   Reply With Quote
Old 12-18-2004, 11:31 PM   #3
AA Team Emeritus
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
A closed loop is a pump that draws water directly from the aquarium and pumps it right back into the aquarium. There is no sump or other open container in between. It is for flow/current only although, if there were a need, one of the large canister filters could be plumbed inline using the closed loop. Advantages are 1) You can run a large pump without worrying about having a huge overflow to handle the flow 2) It is basically a sealed system so there is very little chance of a leak 3) It makes for a neater tank...no powerheads hanging around 4) an external type pump is typically used...these are more reliable and quieter than the submersible types 5) it can be combined with an SQWD for wave action 6) it doesn't add a lot of heat to the system.
Disadvantages: none that I can think of
In a 180g reef that I maintain, I have a 1" line with a strainer on it about 4" under the surface of the water. This goes over the back edge of the tank to a 1200gph pump. The return comes back up and over the wall of the tank to a depth of about 6" under the surface where it splits so water is directed in two directions. It works quite well. I have valves on both the intake and returns right above the pump so I can remove the pump with minimal spillage. As long as you don't empty the lines, the pump will restart with nothing more than a small burst of bubbles into the tank. I intend to add an SQWD to it and replumb the returns in the future. HTH.
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

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
closed loop .HELP PLEASE cassanova General Hardware/Equipment Discussion 2 09-21-2005 09:37 AM
Anyone using closed loop? Scatcat General Hardware/Equipment Discussion 13 06-18-2005 10:33 PM
Closed loop on 2.5 penguinsix General Hardware/Equipment Discussion 1 04-18-2005 03:39 PM
Best way to do a closed loop? pomme Saltwater Reef Aquaria 5 04-27-2004 10:50 AM
Closed loop puffer DIY Projects 18 03-17-2003 11:56 PM

» Photo Contest Winners

All times are GMT -4. The time now is 12:36 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.