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09-03-2006, 10:27 PM
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#1 (permalink)
| | Scooter Blennie
Join Date: Sep 2005 Age: 26
Posts: 1,200
|  OF with weak siphon
Ok guys, I'm getting bubbles in my u-tube and it's causing my syphon to weaken. I keep getting a giant bubble that is built from small ones hanging out in the middle. What the hell is causing this as I never had this problem before? Anyone got any ideas? Had a similar problem and found a solution or cause?
Thanks in advance! 
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30g reef tank, CPR CY192 filter w/ DIY plumb running Rio 17HF return, Coralife 3x 9w UV Sterilizer, 3 24W T5-Helios 10K Daylights/3 24W T5-Helios Blue lights, 2 Logysis blue meteor light strobes (moonlights/24 Blue LEDs).
Tiger tail cuke, asst. snails/hermits, asst. feathers, rainbow acan,zoos,shrooms,bubble,galaxea, asst. shrimp, 2 ocellaris,mandarin,zebrasoma xanthurum,pink-spot watchman,red-striped pistol. | 
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09-04-2006, 06:13 AM
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#2 (permalink)
| | Stylophora
Join Date: Aug 2004 Location: Montreal, QC,Quebec Age: 29
Posts: 999
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Never had the problem myself (never used an external OF) but i have a couple of friends that have some. They have a small nipple on the top of that U tube with a small air line running down to the sump or attached to an air lift pump. That way the air is always taken out.
Marc _________ 
20Gal, 45 lbs LR, 65W PC 10 000K + 65W PC 20 000K + 10Gal sump/fuge
Livestock :hermit and snails, Green star polyps, Button polyps, Finger leather, Xenia, Zoanthids, Mushrooms, Yellow polyps, montipora digitata, acropora, ?mistery polyps?, mistery crab, six line wrasse | |
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09-04-2006, 06:27 AM
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#3 (permalink)
| | Feather Duster
Join Date: Jan 2004 Location: Lynnwood, WA
Posts: 215
Karma: 64
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Quote: |
Originally Posted by rickzter Ok guys, I'm getting bubbles in my u-tube and it's causing my syphon to weaken. I keep getting a giant bubble that is built from small ones hanging out in the middle. What the hell is causing this as I never had this problem before? Anyone got any ideas? Had a similar problem and found a solution or cause?
Thanks in advance! | Hey rickzster,
Is your return pump matched well to the overflow? Sounds like you need to push water a little faster through the U-tube. I oversize the return pump a little and use a ball valve to regulate flow to push maximum water. Also keep U-tube clean of alge and corraline. Let me know if that helps.
Best, Scott
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Researching NTS.......No Tank Syndrome. | |
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09-04-2006, 12:07 PM
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#4 (permalink)
| | Scooter Blennie
Join Date: Sep 2005 Age: 26
Posts: 1,200
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Quote: |
Originally Posted by szidls Hey rickzster,
Is your return pump matched well to the overflow? Sounds like you need to push water a little faster through the U-tube. I oversize the return pump a little and use a ball valve to regulate flow to push maximum water. Also keep U-tube clean of alge and corraline. Let me know if that helps.
Best, Scott | I have a rio 17HF. Pretty fast. But you know, I've been suspecting my return being too slow. Eversince I cleaned it, it's been pretty slow. I might take it out and see what's up. | |
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09-04-2006, 09:40 PM
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#5 (permalink)
| | Fire Worm
Join Date: Jan 2005 Location: Barberton, Ohio Age: 29
Posts: 164
Karma: 15
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I had the same problem a while back and had to buy a bigger return pump. It worked fine until I increased the height of the aquirium (DIY Stand), then it just could not keep up.
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75g (7/04), 4x65watt cf, ASM G3, 65g refug, turbo-twist UV sterilizer, 2 koralia, Quiet One 3000, 123# LF, solar fairy wrasse, blue hippo tang, banggai cardinal, green chromis, O. clownfish, royal gramma, yellowheaded jawfish, serpent star, xenia
29g (9/04), 65 watt cf, coralife needle wheel, wet/dry, 1 koralia, 25# LF, coral beauty, b/w percula, yellow watchman
75g (8/07) 4x65watt cf, ASM G2, 2 koralia, 30 g refug, Quiet One 3000, 100# LF, Blonde naso tang, frogfish | |
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09-05-2006, 02:49 AM
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#6 (permalink)
| | Spanish Shawl Nudibranch
Join Date: Sep 2004 Location: Cleveland, Ohio Age: 32
Posts: 75
Karma: 4
 
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You could also lower the overflow box in the aquarium a little. Might increase the flow through the U tubes, pushing all bubbles out.
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300 Freshwater Predator aquarium, Peacock Mantis shrimp 46 bowfront,Oceanic 144 Half circle reef ready aquarium, PFO Pro 36" canopy, 2-14k 400 watt Megachrome Halides, 2-110 Actinic VHO's, 2-1 Watt Pfo Moonlights. Octopus nw 200 skimmer, Two little fishes Phosban reactor, Mag drive 2400 return pump, Pro clear aquatics 300 sump, 3 maxi jet 1200's with sure-flo kits. Tangs, various wrasses, flame angel, Fang blenny, various gobies and more... | |
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