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Old 05-18-2010, 09:52 PM   #11
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Originally Posted by DragonFish71 View Post
Does anyone else have trouble with the suction power of their python in larger tanks?

When I'm cleaning our smaller tanks (55g, 5g, 29g, 14g, 40g, 29g, 10g, 20g) I have no problems with suction and get those tanks cleaned fairly quickly. When I move to our 120 or 80 I have problems. Since I'll be setting up two 115g tanks sometime soon, I want to figure out what the problem is and fix it. My python has a 50 hose and all the standard fittings that came with it.

For cleaning the 80, 29, 5s, 20, and a 10, I have it hooked up to our kitchen sink, upstairs. The problem isn't as bad and I can somewhat live with it, but when I do our 120 eeesh

To clean our 120 I have hooked it to our basement bathroom sink and directly to the pipe coming in from the wall for the shower head, both are bad for suction. The pipe for the shower head has a bit more pull to it, but still not enough. Our 55, 40, one of our 10s, and a 14 are in the basement, I hook them to the bathroom sink and they clean fine.

I've also tried using it without hooking it to a water source, just letting gravity do the work, that doesn't clean for crap (literally) no poo gets sucked up, just water.

Any ideas? And thanks in advance.

You said you had a fifty foot hose attached to you python? You could try a shorter hose. Water is 8 lbs a gallon, and that would reduce the weight of water you are pulling to match you water pressure

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Old 05-19-2010, 12:02 AM   #12
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Your problem is probably elevation. whats the difference in height between the water level in the problematic tanks and the sink adapter? also, is it problematic from the start or does it just get bad after removing a certain amount of water? Cliff your idea is helpful but not for that reason, more tubing means more friction which means the water will move slower. fittings will do the same but more so. In pipes (and tubes) the main driver is elevation change between the ends of the pipes/tube via the Bernoulli equation (h1+v1^2/2g-hf=h2+v2^2/2g where point 1 is above point 2, hf is the frictional loss from 1 to 2).

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Old 05-19-2010, 04:52 PM   #13
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I once had a suction problem with my python, I found out one of the fittings was loose enough to let air and the tiniest amount of water gargle and bubble out. Tightened up all my fittings and I was back in business.
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Old 05-19-2010, 05:11 PM   #14
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Well... if you really want power... and the outside hose faucet is readily available.... for my 55 gallon I hook my python up to the outside hose faucet to empty it. You can vary the sucking power by how high you turn the water on - and you can drain the 55 gallon in minutes if you turn it on high (not recommended if you have fish in there). My hose faucet is right outside the window from the tank, so I just hook it up there. Obviously to fill it I have to figure something else out though

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