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06/12/2008, 06:39 PM
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#1 |
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Moved On
Join Date: Apr 2006
Location: TX
Posts: 1,643
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needlewheel vs recirc?
Can someone please concisely explain the difference between a needlewheel skimer and a recirculating skimmer?
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06/12/2008, 08:14 PM
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#2 |
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Moved On
Join Date: Apr 2006
Location: TX
Posts: 1,643
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no one knows?
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06/12/2008, 08:26 PM
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#3 |
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Premium Member
 Join Date: Sep 2005
Posts: 3,626
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Sure
I guess you are talking about single pass NW skimmer vs recirc NW skimmers. Most of the time they are refer to as in-sump NW vs external NW but that is kinda misleading. Because some recirc NW skimmer can be run insump also. For example I run my recirc nw [DAS ex-2] in sump. With all things equal a recirc skimmer will out perform an insump skimmer. Plus the recirc has some other benefits: -Changes in the sump's water level doesn't effect performance. -You can plumb the overflow to feed the skimmer. So you get the "dirtiest" water. - You can change the rate you skim without hurting performance. - You can control the dwell time and it is always greater than the same type insump. -*can be place external or in-sump The only bad things about recirc is that they are mostly taller than the same type insump. Also there is a wider selection of insump and recirc usually cost more. That is a basic run down. |
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06/12/2008, 09:39 PM
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#4 |
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Registered Member
Join Date: Dec 2005
Location: Warrensburg, Mo
Posts: 763
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search the forums, there was an article about this earlier that went in depth
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