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Old 08-27-2013, 01:57 AM   #1
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Bottom of Tank Overflow?

Since I have a turtle tank I was wondering if this could be possible? I was thinking of adding a slit in the PVC wide enough to cause an interruption in siphon, but still allow for most of the flow to come from the original opening at the bottom of the pipe. The idea is that when the water level reaches my main surface overflow, the bottom skimming overflow slit will also be at the same level, in which air will enter the PVC and interupt siphon. So I'm talked two overflows here, one for surface and one for bottom. Really trying to design a sump system that will accommodate heavy turtle waste. There has to be a way! Ill try to get an actual design posted incase I'm confusing anyone.
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Old 08-27-2013, 01:52 PM   #2
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Ok so this is the design. I'm curious if this will work please let me know if anyone has tried this?
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Old 08-27-2013, 04:18 PM   #3
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Come on no one is interested in this? I may just have to conduct the experiment on my own.
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Old 08-27-2013, 08:28 PM   #4
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It looks like a good idea. It will most likely change your flow rate though impacting the return pump.
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Old 08-27-2013, 09:07 PM   #5
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Quote:
Originally Posted by Airgoose2222 View Post
It looks like a good idea. It will most likely change your flow rate though impacting the return pump.
I'm wondering they too. Not sure if I should connect it to the main overflow or create a seperate line.
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Old 08-27-2013, 10:10 PM   #6
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Quote:
Originally Posted by bshenanagins View Post

I'm wondering they too. Not sure if I should connect it to the main overflow or create a seperate line.
If you put it on a separate line, then perhaps you could add a gate or ball valve to control water flow.
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Old 08-27-2013, 10:56 PM   #7
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Good idea. I'm tired of sumps being only limited to specific setups. I know there has to be a way to modify it to work with a lower overflow.
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Old 09-01-2013, 12:20 AM   #8
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If I'm following you right, the lower overflow as you call it is siphoning water from bottom of tank over the top of the tank like a lift tube. A small hole drilled in it below the water line should be enough to break the siphon, when the water level drops below it and air gets in it. A small hole shouldn't effect the flow up the tube too much. It should only take a small amount of air flowing into the tube to stop it. you could try it and if not enough drill another hole, until you get the result you want.
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