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Old 01-17-2012, 07:01 PM   #1
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open bottom tank help

im lookin at building several tanks one is an open bottom tank i know the principle of it but my main question is how do i get the water to the top i heard about a pump you can get for this job that can suck out air but stops when the water hits it or something where can i get one. or some any other ideas. but pls keep it in mind im in england (if you unsure what an open bottom tank is type it in youtube)
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Old 01-17-2012, 07:42 PM   #2
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You have to such on a hose in the top section. The end of
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Old 01-17-2012, 09:36 PM   #3
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thats all good but im planning on a co2 kit and air pump so need something electric pump so the air wont push the water back but also needs to be adjustable so i can match it to the air going in
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Old 01-18-2012, 04:44 PM   #4
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I dont think you need to match it,just make sure its more powerful,problem I see is if the pump fails,the air will still be going in.
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Old 01-18-2012, 04:56 PM   #5
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i could use a check valve
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Old 01-18-2012, 05:40 PM   #6
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Or put the air pump on the outer sections of the tank, less worry...
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Old 01-20-2012, 01:55 AM   #7
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Hey there, I currently have an open bottom tank (check out my threads on it) and actually you dont need the suction pump running all the time, just to stablish the negative pressure. Then the down force created by the water which displaced the air matches the upward force of the water and voila it stays up there. You just have to make sure the water level doesnt go below the entrance of the vertical tank.
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Old 01-20-2012, 07:17 AM   #8
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Quote:
Originally Posted by andresdeo View Post
Hey there, I currently have an open bottom tank (check out my threads on it) and actually you dont need the suction pump running all the time, just to stablish the negative pressure. Then the down force created by the water which displaced the air matches the upward force of the water and voila it stays up there. You just have to make sure the water level doesnt go below the entrance of the vertical tank.
i found out you can use a diaghram pump which also has a one way valve. but i think i can use a canister with a pump primer thats if they have a one way valve or use a a combi of both
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Old 01-20-2012, 07:48 AM   #9
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How big of an open bottom are we talking about?
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Old 01-20-2012, 08:00 AM   #10
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about 300 litres all together
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