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#1
12-05-2007, 04:42 PM
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i would drill some holes at the top of the U as it come over the top just around where the water line will be. This will introduce air into the tube therefore breaking the suction of the siphon. But due diligence to keep those holes open is needed - such as removing coraline algae growth. I would drill 2-3 holes because moving snails could plug up the holes just when it "least expect" it. Likelihood a snail is over one hole is slim but possible, over two holes simultaneously very unlikely, but over three holes...... the reef gods must be angry and somebody's gonna get hurt...... real bad.
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____________ If people don't die, it wouldn't make living important. And why do we fall? So we can learn to pick ourselves up. 
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#2
12-05-2007, 05:14 PM
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Is the tank already drilled, is this why you are looking at it this way?
__________________
- Greg 90G : Light - Tek 6xT5 | Skim - EuroReef RS135 | Flow - 2xVortech MP40W | Control - Reef Keeper 2
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#3
12-05-2007, 05:16 PM
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Yeah, I actually drilled it for a closed loop, and then changed my mind. Doh! So now I'm just trying to make the most of it.
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~Drew 10G Nano * 10G Sump * Deltec MCE 600 Skimmer * JBL Viper 150w MH * Zeovit * Vortech MP40W Millions long for immortality who do not know what to do with themselves on a rainy Sunday afternoon. ~S. Ertz 
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#4
12-05-2007, 07:37 PM
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Might not help your livestock but a really really big sump would keep the water off the floor
 .Could also internally to the tank raise the height of the return nozzle so any water drained back would be manageable.
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#5
12-05-2007, 08:08 PM
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what about attaching an airline as a siphone break (or two for safety) and putting a check valve on the airline so the air only flows one direction. fixes the spray from pump operation...
__________________
Everything I put in my tank is fully dependant on me.
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