Does the carbon inside your filter remove nutrients from the water?
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Old 01-20-2013, 09:40 PM   #1
AlanLe
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Does the carbon inside your filter remove nutrients from the water?


Does the carbon inside your filter remove nutrients from the water?
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Old 01-20-2013, 11:03 PM   #2
Rich Guano
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Yes, it does. But only for a couple of weeks, when it becomes so clogged with nutrients that it can collect no more. Then it is essentially reduced to being decent biological filtration.

Generally we only use carbon in the filter to remove (recently used) medications. It serves no other positive purpose in a well planted tank.
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Old 01-21-2013, 12:22 AM   #3
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People disagree about this, but in my tank's filter, I switched out carbon for purigen and my tank is clearer and the plants seem to be doing better since then. But rich is right, no need for carbon in a planted tank.
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Old 01-21-2013, 01:24 AM   #4
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i run carbon in my tanks as a safety measure. i have to much time and money invested in my tanks to not.
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Old 01-21-2013, 01:25 AM   #5
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I haven't used carbon in years.
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Old 01-21-2013, 01:27 AM   #6
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I use carbon only when I have a concern about the tank, but most of the time it's only temporary and I remove it. I've never used purigen in my planted tanks before.
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Old 01-21-2013, 01:44 AM   #7
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I thought activated carbon did not have a great affinity for most of the salts we use when we dose dry ferts or dose them wet.
I thought it (AC) could remove the chelated fertilizer (mostly iron). It would probably remove any fertilizer that is in some sort of organic compound.
But, as noted above it gets full of other things pretty fast and stops removing anything.
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Old 01-21-2013, 02:04 AM   #8
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Pretty much agree with all the comments above.
Using carbon seems to be a reasonable clarifyer for a short period of time, and does remove unwanted meds after a treatment, but other than that, it seems quite suspect for doing any good after a while, perhaps even leaching unwanted elements back into the tank in time. I've avoided it for many years.

After much lengthy trial over the years, I much prefer Purigen, which does a great job on a long term basis at removing impurities, clarifying, polishing, and purifying.
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Old 01-21-2013, 06:45 PM   #9
Bubba Shrimp
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Where do you get purigen filter pads I have a eheim 2213?
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Old 01-21-2013, 08:00 PM   #10
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You can buy Purigen in it's own fine mesh bag (100 ml, I believe), or you can get the Purigen particles loose in a 250 ml jar, and bag it yourself in a suitable sized fine mesh bag, to more or less fit your filter placement.

The Purigen beads are very tiny though - so be careful you have a fine enough mesh bag to contain the particles, or double-bag so they don't escape. It can make a bit of a mess in your tank if they do.
You can get 2 sizes of suitable bags at most PetSmart stores (but double-bag).
Or you can buy different-sized Organza bags at gift shops/dollar stores, etc.
Or you can use doubled-up nylon stocking material.
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