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Old 10-12-2003, 08:17 PM   #1
caught29
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I have an Eheim Liberty 200 filter on my 20-long tank, but since i've added plants recently it creates more water movement than necessary. It has a dial to turn the flow down for 'feeding'. Would there be any ill effects to leaving it on the low-flow feeding setting permanently? Could the impeller possibly overheat or something like that? Its a great filter and I'd rather not ruin it.

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Old 10-12-2003, 10:59 PM   #2
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Caught,

Not that I am an Eheim expert but most filters (all that I know of) have a constant spinning impeller. The way to adjust the "flow" is just by restricting the ammt of water that actually reaches the constant spinning impeller. This is how I believe this works although I am not sure. With that being said and if the above is true It should not harm your impeller one bit.

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Old 10-12-2003, 11:18 PM   #3
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Another way of "reducing flow" is by increasing the surface area of the output. Several people on the forum have made PVC attachments with holes drilled in them so that the water movement is spread more evenly throughout the whole tank.
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Old 10-14-2003, 03:40 AM   #4
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Guttboy: that was my understanding of how the filter worked also, I just wasn't 100% sure if reduced flow affected impeller cooling in any way. I had my last filter (penguin mini) burn out on me and didn't want that to happen again.

DleDeaux: Infact the other night i was so bored i tried to construct a channel for the front of the filter so the water could run down gradually. It didn't work as well as planned, but I hadn't thought of drilling holes in it like a rainbar of sorts.

If the reduced flow is still too much movement then I'll try the rainbar idea again. Thanks guys!
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Old 10-15-2003, 12:58 AM   #5
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Caught,

Both Wasserpest and myself have done the same thing reducing the flow with a "rainbar" extension to our filters...works like a champ!

Mike
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Old 10-16-2003, 02:11 AM   #6
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I don't know if it fits the Eheim or not but I have (and I'm not using) a spray bar that is essentially a tube with one end blocked and holes in it to calm the flow from my Fluval 3 series - it works great, nice steady flow, it just doesn't 'fit' in the tank since I altered it. I think it was about $7, amd I am dead certain it would be relatively simple to modify if that was even necessary. Good luck!
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Old 10-16-2003, 02:32 AM   #7
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metallhd: the liberty filter isn's a canister, its a hang-on-back, so it wouldn't work with the exact thing you're talking about. I think it would be more of a bar placed across the front of the two outflows, but the general idea of a tube with holes drilled in it is the same.
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Old 10-16-2003, 03:41 AM   #8
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I just had a look at the filter, looks like my Aquaclear in terms of modification - Guttboy and Wasserpest were talking about the rainbar thing - I wonder if they have it attached at the intake end - it seems to me that this would dramatically restrict flow - the only other thing I can think of is to fix a piece of sponge up inside the filter to restrict the outflow - I'm thnking this could be a little dicey, though - see Bucks recent problems if you need any more pause for thought. :P
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Old 10-16-2003, 03:07 PM   #9
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The spray bar is on the filter exhaust. It spreads the outflow over a larger area to reduce the concentration of current.
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Old 08-22-2013, 10:17 PM   #10
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Quote:
Originally Posted by DLeDeaux View Post
Another way of "reducing flow" is by increasing the surface area of the output. Several people on the forum have made PVC attachments with holes drilled in them so that the water movement is spread more evenly throughout the whole tank.
I was just browsing and found this thread.I have an Eheim Liberty 2040(it has a single outflow). https://www.google.be/search?q=eheim...ml%3B300%3B160
.In the outflow I stuffed a big squared sponge ,which almost reaches the lid of the filter.That way the water rises inside the HOB and cascades through the sponge ,even forming a watery pelicule on the outside ,when it is on high, yet it highly reduces flow.
I can adjust the surface movement by slightly raising\pulling the sponge ,so less water has to go through it ,and goes straight in the tank instead.
It serves as final filtration ,aeration ,cooling ,and fine surface skimming adjuster.
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