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Old 08-02-2013, 11:53 PM   #11
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Originally Posted by Mebbid View Post
Wow. A ton of suggestions and we don't even know the specific set up...

Assuming its a gravity fed ato with 1 hose leading to the sump I can see where your problem lies. A successful ato system needs two hoses. 1 in the bottom of the resivoir to feed water into the sump and another hose coming out of the top of the container. Keep the top hose where you want your fill line to be and the water line closer to the bottom.

When the water level drops below the top hose it allows air to flow through letting the water flow into the sump until the water level reaches the top tube.

The bucket has to be air tight for this to work.
Yikes! Gravity fed ATO. That's playing with fire... I mean water... Well, you know.
Upgrade to a proper ATO. :P

Also, not trying to nitpick here but, what you describe holds a very good chance of fouling your ATO water with a reverse syphon if great care is not taken. Maybe I am envisioning it incorrectly?
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Old 08-03-2013, 12:22 AM   #12
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thank you guys for trying to help.
(forget about top offs and everything that might confuse you)
i was thinking of using 1/2" pvc and like chenzo9999 having it go into a 3/4" pvc to let air in and stop the syphon. will that be messy? and most important will it work 100times out of 100?
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Old 08-03-2013, 12:26 AM   #13
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bigger drawing
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Old 08-03-2013, 12:27 AM   #14
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oops... here it is
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Old 08-03-2013, 12:40 AM   #15
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Keep the outlet end of the ATO tube above the water level in the reservoir and it will work fine.
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Old 08-03-2013, 01:14 AM   #16
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Yikes! Gravity fed ATO. That's playing with fire... I mean water... Well, you know.
Upgrade to a proper ATO. :P

Also, not trying to nitpick here but, what you describe holds a very good chance of fouling your ATO water with a reverse syphon if great care is not taken. Maybe I am envisioning it incorrectly?
Actually, from what I understand of the mechanics of it it's a pretty sound concept. I don't run it personally but I don't see any real chance for there to be a back siphon into the supply. It's hard to explain without pictures. I'll draw a pic of what I mean when I get a chance.
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Old 08-03-2013, 01:19 AM   #17
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The siphon is pulling water into the ATO from the refugium correct?

If that's the case then this is the way to solve it.

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Old 08-03-2013, 01:45 AM   #18
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That configuration is the opposite to what he got. The sump water level is below the ato containe level. To make it simple use an Aqua Lifter instead of a regular pump. You mount it outside above the ato container to stop the siphon.

http://www.amazon.com/s?ie=UTF8&page...Aaqua%20lifter

Or you can just cut the end of the tube as short as possible.
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Old 08-03-2013, 03:18 PM   #19
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Keep the outlet end of the ATO tube above the water level in the reservoir and it will work fine.

this. if the level of the outlet is below the waterlevel in the ATO tank then the water will fall and keep sucking the water out, if the level is higher you shouldn't have any real issues with pressures pulling down on the outlet side
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Old 08-03-2013, 05:05 PM   #20
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Simple solution which a few people of posted, take the hose out of the water. Water stops, siphon breaks. No need for special equipment.
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