Slowing down a penguin - The Planted Tank Forum
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post #1 of 23 (permalink) Old 09-08-2007, 11:49 PM Thread Starter
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Slowing down a penguin

Im curious if anyone here has tried to slow down their penguins filter flow (the ones without the valve)

Currently im thinking of installing a dimmable plug. Not sure if it will work so im asking if anyone else has done it before i go and buy the dimmer.

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post #2 of 23 (permalink) Old 09-09-2007, 01:11 AM
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Eh, I doubt the dimmer will work. Who knows it just might though. I would try that first, Then you can modify the filter a little to make it slower. If you are trying to reduce surface agitation you can cut the plastic from a soda bottle. Then silicone it to the exhuast of the filter, so it "glides" the water into the surface.
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post #3 of 23 (permalink) Old 09-09-2007, 01:42 AM
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Why not just try packing in extra filter floss. It'll also help polish your water.

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post #4 of 23 (permalink) Old 09-09-2007, 01:51 AM
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The dimmable thing will most likely cause the filter to run noisier and improperly, may damage your motor.

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post #5 of 23 (permalink) Old 09-09-2007, 02:04 AM Thread Starter
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i personally don't see how it would damage the motor, after all, it will be supplying a lower voltage to it, and the in rush current wont be increasing either. its more of a matter of if the motor's coils would create a strong enough magnetic field to turn the rotor at a low enough voltage. I know enough that it will work to decrease the flow to some extent, but if it will work at a noticable level is a whole other question.

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post #6 of 23 (permalink) Old 09-09-2007, 02:11 AM
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my girlfriend says " throw a peice of fish at it"
I would pack more floss in it. Just be VERY carefull of it clogging, and then spilling out over the filter. Maybe put a small ball valve on the inlet of the filter.
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post #7 of 23 (permalink) Old 09-09-2007, 05:16 AM
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Quote:
Originally Posted by outcast View Post
i personally don't see how it would damage the motor, after all, it will be supplying a lower voltage to it...
The motors in aquarium filters work quite differently than the standard brushed motors you're probably used to. Lowering the voltage could actually cause damage. I like the idea somebody else suggested about just adding more media.

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Originally Posted by cookingnerd607 View Post
Maybe put a small ball valve on the inlet of the filter.
You don't want restrictions on the inlet of any filter, this will just cause cavitation which can destroy the filter in short order.

You could also trim the impeller down. This would be irreversible of course, but it's an option.
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post #8 of 23 (permalink) Old 09-09-2007, 07:15 PM
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Take air tubing, like silicone tubing, and cut small segments to the length of maybe half or all of the blades on the impeller. Slip the airline pieces over the impeller and that should slow the flow.

How many blades are there?

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post #9 of 23 (permalink) Old 09-09-2007, 07:27 PM
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....+1 vote for adding more filter floss. That's how I do it and it works well. Or add a bag of Purigen.
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post #10 of 23 (permalink) Old 09-10-2007, 04:48 AM
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I had leftover Aquaclear white sponge media from the filter tube prefilters I made, so I just cut a 3/16" strip of it and laid it on the Penguin outlet. It slows the water down really well & also helps keep the shrimp out of the filter box.

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post #11 of 23 (permalink) Old 09-10-2007, 11:35 PM Thread Starter
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what i ended up doing was cutting out the middle section of a 750 ml water bottle, cut a strip out of it, and used the left over piece to wrap around the intake. The plastic curls under the spillway and into the water a bit. the top wedges nicely between the filter and its cover. It stops almost all surface agitation, and due to the plastic under the water, and no more bubbles of air deep into the tank. the tank remains very still now thanks for the ideas

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post #12 of 23 (permalink) Old 09-12-2007, 07:46 PM
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I personally don't have any problems with the flow of a penguin. It's just that the noise level that gets annoying at times. But I know that my brother has tried and used a sponge around the outlet and has done a pretty decent job.
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post #13 of 23 (permalink) Old 09-12-2007, 09:10 PM
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it is SOO easy! all you do is lift the intake tube into the air a little bit!
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post #14 of 23 (permalink) Old 09-13-2007, 04:10 AM
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Yeah the penguins should have the movable intake tube that you pull up on to slow. However if accesability is a problem I wonder if a variac would work... I'll have to try. might be an expensive option though. If I am not mistaken the motors should be shaded-pole motors like in a ceiling fan.


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post #15 of 23 (permalink) Old 09-13-2007, 12:17 PM Thread Starter
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my model doesn't allow for the intake tube to be raised. i'll need to set the filter cover ajar, and it always seems to get bumped when i remove the tank hood and falls back in place forcing the tube back down

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