Reducing flow rate for Koralia Nano....??
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Old 08-04-2012, 02:08 AM   #1
Cento
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Reducing flow rate for Koralia Nano....??


So, in order to create a completely "dead-zone" free environment, I bought a Koralia Nano (240 gph) to help create a circular pattern in Tank flow.

It's super compact, and super silent. It's nice, but still a little too Fast. Anyone ever try to "mod" the Nano, or have a suggestion on how to reduce the flow rate?


Thanks in advance.
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Old 08-04-2012, 02:23 AM   #2
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Did not do it intentionally but I find the flow is reduced when leaves float against the backside. How about just some clear food wrapper like the clingy stuff. Superglue to hold it from being sucked in totally?
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Old 08-04-2012, 02:31 AM   #3
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Did not do it intentionally but I find the flow is reduced when leaves float against the backside. How about just some clear food wrapper like the clingy stuff. Superglue to hold it from being sucked in totally?
Hmmm... Well, I'd worry that after some time, the cling wrap would become tattered like an old flag on a hill, and get sucked int the impeller.


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Old 08-04-2012, 03:01 AM   #4
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The only way I know would be a wave maker so it would turn on and off every couple seconds, I'm not sure if you could rig a dimmer into the wiring to reduce the current.
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Old 08-04-2012, 05:43 AM   #5
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What size tank do you have the 240 on? I have two 240's on a 25g and I find its just enough flow. If you wish to decrease the flow, point it toward the glass of your tank.
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Old 08-04-2012, 10:16 AM   #6
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What size tank do you have the 240 on? I have two 240's on a 25g and I find its just enough flow. If you wish to decrease the flow, point it toward the glass of your tank.
It's a 9.5 gal, and the powerhead is pointed toward the glass at the opposite long end. But it's still too fast. The plants are vibrating rather than gently swaying, if that makes sense.


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Old 08-04-2012, 10:20 AM   #7
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What about epoxying some intake slots??? Would that do the trick? Would that damage the motor over time? It shouldn't since it's a frictionless impeller, no?


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Old 08-04-2012, 02:47 PM   #8
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No damage to this type motor. There are no windings on the moving parts to heat up and melt down. If concerned about how long a shield would last, I would move to a thicker material. Plastic sheets of Evergreen styrene are available from .010 up to .080 at hobby shops.
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Old 08-04-2012, 02:52 PM   #9
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I had the same issue.. i wrapped a filter pad around it.. reduced flow to where i wanted it to be and it worked as a filter.

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Old 08-04-2012, 03:00 PM   #10
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Could you mod (shorten?) the impeller blades?
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Old 08-04-2012, 03:37 PM   #11
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Id wrap something around the intakes like others have mentioned. Cut a sponge filter block to size, and stick it around it. This would work the best, I think.
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Old 08-04-2012, 05:45 PM   #12
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Thanks for all the replies!!

I'm torn between modding the impeller, and just putting some filter floss around it.....

I guess in the long run, the "filter pad wrapping" route would be better for future resell. I'm gonna try that.

It's too bad they don't make Powerheads less the 240 GPH... Like 120 or something...




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Old 06-12-2015, 11:04 PM   #13
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I'm in the same boat, was thinking of trimming the blades a bit to try and soften the flow
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Old 06-12-2015, 11:20 PM   #14
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Maybe open it up, cut a small round piece of plastic the size of a dime, center it over the front of the grill, secure it to the front grill with fishing line or small zip ties. It would be removable. Hopefully it will reduce the flow and disperse it more.

Last edited by The Big Buddha; 06-12-2015 at 11:58 PM.. Reason: Addition
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Old 06-13-2015, 12:54 AM   #15
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Or even large black zip ties on the front grills will help slow the flow.
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