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Old 10-04-2005, 05:04 AM   #11
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Originally Posted by greenmaji
looks pretty good..
how big is your tank? currious..
and all those 90 degree joints are scarry 8O kidding..
My tank is 75 gal...



Quote:
Originally Posted by runway1
Not to be a downer but yes, you put your finger over the hose and that will decrease your flow rate and increase the pressure, thus the increased water movement.

Problem is, your mags aren't designed for back pressure. So i would suspect you'll greatly decrease their lifespan. If you don't mind replacing mags, you're fine. That's why some pumps (mostly external) are pressure rated and others are not. Some are designed to "push" through resistance of some sort (restricted opening) and some aren't.

Well I have already thought of that and Im going to contact Mag drive and see what they say...If these are designed to run for lets say 5years and I kill it in 4 then I wouldnt mind .


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Originally Posted by flanque
what is the purpose of this project? i have 2x 1500L/hr power heads and a 1500L/hr canister filter which I would like to better use to eliminate dead spots and increase water flow.
The purpose of this project is to get all the powerheads out of the tank and make some room,Large powerheads take up some prime property.And most of all is the amount of water flow.
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Old 10-04-2005, 09:31 AM   #12
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Do you have a thread on this forum on what process you went through? I wouldn't mind having a read and see how you did it and what I may be able to apply to my tank.
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Old 10-04-2005, 09:36 AM   #13
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Here is the link:

http://www.melevsreef.com/closedloop.html
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Old 10-04-2005, 11:02 AM   #14
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Quote:
Originally Posted by runway1
Not to be a downer but yes, you put your finger over the hose and that will decrease your flow rate and increase the pressure, thus the increased water movement.

Problem is, your mags aren't designed for back pressure. So i would suspect you'll greatly decrease their lifespan. If you don't mind replacing mags, you're fine. That's why some pumps (mostly external) are pressure rated and others are not. Some are designed to "push" through resistance of some sort (restricted opening) and some aren't.
i learn something everyday. i have a Pentair Quite One 4000 ( 1017gph ) pump in my sump. i wanted to add a SCWD and some water deflectors and everything else to get water moving around the tank. but since this pump is not design for back pressure i am going to another plan. or can i add a SCWD and be safe. i have approx 5 feet of overhead and it will average about 700-800 gph. should i move over to an external pressure rated pump?
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Old 10-04-2005, 07:24 PM   #15
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The powerheads I use have a flow control arm on them so that you can decrease and increase the flow. I would suspect these would be rated to take some of this 'back pressure' mentioned. Agreed?

They are Aqua One 1200L/hr powerheads.
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Old 10-05-2005, 11:52 AM   #16
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All pumps take "some" back pressure. Just the physics of moving water causes that. But, when you take 3/4 diameter PVC hole and squish it to 10%-20% of the area, that's a different story.

Not that it won't work. Heck I've never tested this specific setup. I'm just pointing out a concern from an engineer's perspective. Again, some pumps are pressure rated for a reason. They are also engineered differently for those applications. Just something to be aware of.

I'd say go for it . If it fails prematurely, you have your answer. If it doesn't, you have a successful design.
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Old 10-05-2005, 11:54 AM   #17
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Hows that return working out in the corner?
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Old 10-05-2005, 01:01 PM   #18
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I just used flexible hose on mine. Working great for over 2 years now.
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Old 10-05-2005, 01:08 PM   #19
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You have one of these set up Kurt??
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Old 10-05-2005, 06:58 PM   #20
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Is there any reason for concern with chemicals "leaking" out of the plastic or sealent?
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