Cutting back flow of Eheim 2217 - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 01-14-2013, 03:05 PM Thread Starter
Algae Grower
 
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Cutting back flow of Eheim 2217

My 26 Bow is is planted in black sand.

My 2217 is a monster - and I love it. I've tried re-directing the flow, using a spray bar, no bar, etc... the bottom line is I'm pushing sand all over.

What is best practice to reduce the outflow of the filter into my tank - dial back the large in-flow tap, or dial back the out-flow tap? Or a little of both?

I'm sure the impeller is designed to move water at X RPM... so I'm thinking of dialing back the larger in-flow tube so I don't restrict the output of the impeller.

Make sense?

But what do I know.

Any knowledgeable suggestions are appreciated.

Thanks

- Ken
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post #2 of 13 (permalink) Old 01-14-2013, 03:10 PM
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Manipulate the quick disconnect valves on the outflow side. If you don't have any, you can always run some barb fittings and a ball valve on the outflow line.
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post #3 of 13 (permalink) Old 01-14-2013, 03:24 PM Thread Starter
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I have all the taps

Quote:
Originally Posted by freph View Post
Manipulate the quick disconnect valves on the outflow side. If you don't have any, you can always run some barb fittings and a ball valve on the outflow line.
In aqua speak:

"Outflow" - water moving out of the tank (in to the filter)

"Inflow" - water moving in to the tank (out of the filter)


or is it the other way around?

Thanks

-Ken
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post #4 of 13 (permalink) Old 01-14-2013, 03:28 PM
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Quote:
Originally Posted by mo2vation View Post
In aqua speak:

"Outflow" - water moving out of the tank (in to the filter)

"Inflow" - water moving in to the tank (out of the filter)


or is it the other way around?

Thanks

-Ken
I think you have a backwards
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post #5 of 13 (permalink) Old 01-14-2013, 03:32 PM
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Inflow=Water moving into the filter (out of the tank)
Outflow=Water moving out of the filter (into the tank)

I was always told to throttle it down using the taps on the outflow side.
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post #6 of 13 (permalink) Old 01-14-2013, 03:48 PM Thread Starter
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Ah - so its the Filter's world

Quote:
Originally Posted by talontsiawd View Post
Inflow=Water moving into the filter (out of the tank)
Outflow=Water moving out of the filter (into the tank)

I was always told to throttle it down using the taps on the outflow side.

We're just living in it.



I've seen it used both ways... figured there had to be a protocol someplace.

So choke the outflow a bit.

Thanks

- K
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post #7 of 13 (permalink) Old 01-14-2013, 04:17 PM
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Throtlle down the outflow, you want the inflow has unobstructed has posible to allow debris to flow into the filter.
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post #8 of 13 (permalink) Old 01-14-2013, 04:20 PM
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Choke down the outflow or buy a 2215 impeller and replace the 2217 impeller and you'll have less flow


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post #9 of 13 (permalink) Old 01-14-2013, 04:27 PM Thread Starter
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Quote:
Originally Posted by vnghost View Post
Choke down the outflow or buy a 2215 impeller and replace the 2217 impeller and you'll have less flow


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Nice!

I saw the 2015 is the same size (I have a couple) but with 3 blades, not 5.

Great idea.


- Ken
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post #10 of 13 (permalink) Old 01-14-2013, 06:41 PM
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Why don't you just direct the spray bar directly into the glass? That's what I did with my 2213 wich was too strong for my 25g, I removed the cap from the spray bar and directed in on the glass in a corner.

Or you could split the outflow of the filter in two and have it go to 2 spray bars on opposite sides of the tank.

But I wouldn't reduce the flow of the filter
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post #11 of 13 (permalink) Old 01-14-2013, 07:54 PM
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You could drill the holes to make them larger on the spray bar. I had to cut mine down to fit it in my tank. I didn't want to ruin it but I told myself that it was just a spray bar not the whole filter and I could always buy a new one if I per chance break it.
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post #12 of 13 (permalink) Old 01-18-2013, 04:44 PM
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Quote:
Originally Posted by Stinkmonky View Post
You could drill the holes to make them larger on the spray bar. I had to cut mine down to fit it in my tank. I didn't want to ruin it but I told myself that it was just a spray bar not the whole filter and I could always buy a new one if I per chance break it.
Great idea also...
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post #13 of 13 (permalink) Old 01-18-2013, 06:23 PM
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You can also drill holes on the opposite sides, so that it sprays two directions (one towards the glass, the other towards the front of the tank, which will even out the flow current in any one direction
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