Using purigen in a sponge filter - The Planted Tank Forum

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post #1 of 21 (permalink) Old 11-06-2013, 06:02 PM Thread Starter
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Using purigen in a sponge filter

So I've been having a nitrate problem, and I want use some purigen to get rid of it. What I'm planning to do is buying a small 20ml packet of purigen on Ebay and them pouting that into my sponge filter's tube and then plugging it with some filter floss.

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post #2 of 21 (permalink) Old 11-06-2013, 06:05 PM
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Hmm, Nitrate problem= water change.

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post #3 of 21 (permalink) Old 11-06-2013, 06:10 PM
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I'm afraid the purigen would go right through the filter floss. It's incredibly small.
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post #4 of 21 (permalink) Old 11-06-2013, 06:15 PM Thread Starter
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Trust me, I've done water changes and the next day it's right back up to 30ppm and the next day around 40ppm. It comes out the tap at 10-20ppm and my RCS haven't been doing too well.

Is there any kind of small bag I could put it in?

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Last edited by Darkblade48; 11-06-2013 at 11:14 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #5 of 21 (permalink) Old 11-06-2013, 06:20 PM
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There are fine mesh bag that would probably work for that, or even possibly panty hose.

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post #6 of 21 (permalink) Old 11-06-2013, 06:45 PM Thread Starter
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Look at all that unused space in there!

No self respecting aquarist worth his salt is without a bucket -Anon

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post #7 of 21 (permalink) Old 11-06-2013, 06:59 PM
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The 100ml packet of purigen comes with its own bag. You should be able to shove it into that space.
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post #8 of 21 (permalink) Old 11-06-2013, 07:06 PM Thread Starter
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It's a 5.5 gallon btw, so I feel 100ml is a bit overkill.

Is there a filter media that actively absorbs or removes nitrates? I've read that purigen just removes the source of nitrate, but not the nitrates themselves.

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Last edited by Darkblade48; 11-06-2013 at 11:14 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #9 of 21 (permalink) Old 11-06-2013, 07:24 PM
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Your tank probably has not finished it's cycle. Be patient, don't throw chemicals at your problems. Purigen doesn't remove nitrates anyways.
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post #10 of 21 (permalink) Old 11-06-2013, 09:45 PM
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Shoving anything in there will restrict your waterflow. If this is an air powered sponge filter it will likely stop your filter from working completely.
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post #11 of 21 (permalink) Old 11-06-2013, 11:11 PM
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I use either Chemi-pure, purigen or polyfilter pads on different tanks .

Either way I think for a sponge filter , A polyfilter pad might be what you are looking for . I have found that current does NOT have to go through it , in order for it to work but there has to be some water circulation in the immediate area and sponge will work.

You just cut the pad into small pieces and change when it turns dark brown .
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post #12 of 21 (permalink) Old 11-07-2013, 01:38 AM
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Quote:
Originally Posted by Cokers View Post
So I've been having a nitrate problem.
Buy some elodia aka armchairs, it eats through nitrates and is an easy grow and it grows floating
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post #13 of 21 (permalink) Old 11-07-2013, 02:04 AM
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I would guess the sponge filter IS the problem. Its probably not enough filtration for your bioload and you would be better off with a HOB filter, even if its a small one.
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post #14 of 21 (permalink) Old 11-07-2013, 02:38 AM
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Get rid of the sponge filter and use the Azoo nano HOB. It's the same thing as the Red Sea deco art nano filter (now discontinued). I use this on a 2.5 gallon and it works great, absolutely tiny and the water flow is adjustable. Besides you can buy yourself a purigen packet, cut it to size, then staple it shut. I believe most staples are stainless steel, so it wont harm your water.

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post #15 of 21 (permalink) Old 11-07-2013, 02:39 AM
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And did I mention CHEAP?? I got mine from Amazon for I think 15$ including shipping.

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