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08/10/2017, 03:52 PM | #1 |
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Join Date: Nov 2012
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Reef Savvy Ghost Overflow, Flow rate.
Just looking at the 21" ghost Overflow from Reef Savvy.
This will be on a 225 Gallon tank. Using a Fluval SP4 (1822 GPH) as the return pump. It will be plumbed in the beananimal style. The site says the Overflow can handle a flow of 2000 gph, but the drains look to be 1", I didn't think that flow would be possible with 1"? Sent from my iPhone using Tapatalk |
08/10/2017, 05:21 PM | #2 |
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1" bean can handle 2000GPH no problem..
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08/10/2017, 05:27 PM | #3 |
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08/10/2017, 09:43 PM | #4 |
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To me it isn't about the gph with any of the ghost style overflows. They can all handle the flow in most people's systems. To me it is more about surface skimming & stability. I always recommend getting the longest one that will fit on the tank. It will give u the best surface skimming & will be more consistent. When I say stability I mean that if u have a small box with a bunch of flow it will be a little inconsistent to where u have to adjust on the valve more often to keep it quiet. The larger the box the more stable it will be. On both of my systems I have really long overflows, not quite c2c. I don't ever have to tweak on the valve, maybe once a year if that much.
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08/16/2017, 09:21 AM | #5 |
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That is allot of flow for a toothed overflow that size. I would be more worried about the capacity of the weir and not the plumbing. If it is around 20", the effective weir is less than 10". So you'll probably be operating at the top of that weir. If a fish dies and gets stuck to it, or a sheet of nori breaks off and covers it, the flow could overwhelm the weir. Then the water level would rise. Since those overflows have a top, there wouldn't be anywhere for the water to go but over the top on to your floor. You could always do some experimenting once you get it set up. Get it running, cover up a 3rd of the teeth. If it doesn't overflow, I would feel safe enough. If it is near the top of the box, turn your pump down a little with a ball valve. Also, you need to be religious about cleaning them. It doesn't take much growth to decrease it's ability to process water, and if it is already operating close to max.....Just keep in mind that the turn over rates are just a suggested ball park. You don't need to meet exactly 6x, 10x, or whatever rate you are planning for. Just tweak the pump until you feel comfortable.
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08/16/2017, 02:32 PM | #6 | |
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Quote:
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Tank: 180 Gallon Mixed Reef; Fish: Hoeven's Wrasse, Red Sea Regal Angel, spot breast angel, Green Wrasse, Juvi Aussie Harlequin Tusk, tangs: powder blue, desjardini, purple, tomini |
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08/16/2017, 05:46 PM | #7 |
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As a fail safe I'm probably going to install a float switch so if water ever gets close to overflowing levels it will turn off the Return pump.
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08/17/2017, 09:44 AM | #8 |
Grizzled & Cynical
Join Date: Apr 2006
Location: Stamford, CT
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I tend to discount the flow rates of any of these by half. On my new build I'm shooting for 1,500 gph through my sump so I bought the 36" modular marine model that claims 3,000 gph. I'm also mounting one of the apex optical level switches at the top of the skimmer box to alert me if the level in the tank rises unaccpetably.
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Simon Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones! Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs |
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