Pump for closed loop?

hillbillyreefer · 03-08-2003, 08:44 AM

I'm thinking about putting a closed loop on my 75gal. What pump would you suggest? I have a mag7 for my sump already.
I have a 4" south down sand bed and am worried I may just be creating a sand storm.

sessydude · 03-08-2003, 09:40 AM

Could you explain closed loop for me ?

Ammck · 03-08-2003, 06:52 PM

Please explain for me too

Thanks !!

:

Xwild · 03-08-2003, 07:28 PM

Hillbilly: sorry, can't help ya, but I'm sure others here can and will...

As for the other folks questions... "what is a closed loop?", I'll do my best.

A closed loop is a method of getting more flow in your tank without the use of powerheads, and without pushing more flow through your sump. What most folks do is drill thru the back of their tank and mount outlet and inlet bulkheads. These are then plumbed directly to a pump. This allows positioning of both the inlet and outlet lines wherever the reefer desires without having to worry about the tank draining when the power goes out, as the plumbing forms a "closed loop". For more info, do a search on this board for "closed loop" and you are sure to find tons of info.

HTH,

hillbillyreefer · 03-08-2003, 07:51 PM

If I've done this right this should take you to a past post on closed loop systems. Closed loop

Doug1 · 03-08-2003, 08:47 PM

Its called a closed loop because unlike water dumping into a sump and being repumped into the tank, the water draws thru one or more drain bulkheads and is pumped either thru a couple sea swirl thingies or multiple return outlets. The trick is to get the high volume flows with variation in the flow that you get the turbulences rather that linear screaming flow patterns.
Obviously fair sized acrylic tanks are really most condusive to doing this but if you search the archives there are one or two glass tanks , non drilled, that have closed loops on them

ScoobityDoobity · 03-08-2003, 09:27 PM

just wondering if there are any pictures of these closed loops from the back of the tank? I'd really like to see one of these. Kinda interested in it now!

Doug1 · 03-08-2003, 09:40 PM

There are pictures from several tanks in the archives, equipment one or look at big tank archive as well

Ammck · 03-11-2003, 11:31 PM

Thanks for the explanation. Pretty clever!

Alex

tdwyatt · 03-11-2003, 11:51 PM

Quote:

Originally posted by hillbillyreefer
I'm thinking about putting a closed loop on my 75gal. What pump would you suggest?

BACK TO THE ORIGINAL QUESTION...

A Mag 5 or 7 or a SEN 700 wilo do fine for your size of tank. You might even consider getting a larger powerhead and attaching it with an adapter to a piece of capped PVC pipe. You can place it behind your rock and use holes drilled where you want them to direct the flow at many angles, creating turbulance on its own. btw, depending on the specie, many corals actually need smooth laminar flow, but changing directions at least 4 times a day to simulate tidal flat flows in shallow seas. The type of flow needed will depend on the biotope you are emulating, as well as the specific species of corals you are planning to use.

HTH,

thebigblue · 03-12-2003, 01:50 PM

if you dont wanna drill your tank you can also go over the back of the tank with your CL...using pvc down to your pump...

i have been thinking about a CL for some time...i have read that some people have had problems using the mag pumps on CL's...as they tend to leak...

http://reefcentral.com/forums/showth...or+closed+loop

HTH

brad

Geoff · 03-12-2003, 01:54 PM

here are some pics of my CLS without drilling holes. it uses a mag 12. it is submerged not due to leaking but due to sound, it has a broken impeller that has been on order forever.

CLS pics

G~

Frank · 03-12-2003, 02:31 PM

I just did my close loop and I used a amp master 3000 the tank is a 150. You realy want to go with a high end pump so you can trun it back if need it. In a close loop you want to much not to little. The thought is to get enough flow high or low were ever you put your out puts. Here are some pics of mine.... And heres a link on it............. http://www.thereeftank.com/forums/sh...threadid=13220

thebigblue · 03-12-2003, 02:32 PM

ive always thought that design was an interesting way to go...

so hows the noise?...vibration?...is that an acrylic shelf it sits on?...do you take the canopy off much?...i would guess it would be pretty easy to take out and clean?...

thanks

brad

hillbillyreefer · 03-12-2003, 03:18 PM

TDWYATT Have you used a sen or mag out of water? I've also read of problems doing that, noise being one of the problems.

Pump for closed loop?

pictures anyone?

Re: Pump for closed loop?