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Old 01-25-2021, 09:36 AM   #1 (permalink)
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Default Activated Carbon

My apologies if this topic has been beaten to death, but I keep reading conflicting info online about activated carbon in planted tanks.
My current setup is Aqueon canister filter which has activated carbon as one layer and also the output goes through what they call water polishing unit which contains a removable filter pad that also has activated carbon in it.
So my question is actually two-fold.
1. Do I need activated carbon or should I remove it immediately as it, according to some sources, removes Iron and other trace elements?
2. Since flow is very important in planted tanks, should I also ditch the water polishing unit and replace it with water director or spray bar?
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Old 01-25-2021, 09:40 AM   #2 (permalink)
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Default Re: Activated Carbon

No, You don't need the AC. It will take out the some nutrients. Your micronutrients is chelated (bounded to an organic molecule) might be taken out by AC.
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Old 01-25-2021, 11:03 AM   #3 (permalink)
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Default Re: Activated Carbon

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No, You don't need the AC. It will take out the some nutrients. Your micronutrients is chelated (bounded to an organic molecule) might be taken out by AC.
That's kind of what I was leaning towards. Should I put some other filtering media in the canister filter in place of activated carbon?
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Old 01-25-2021, 05:19 PM   #4 (permalink)
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Default Re: Activated Carbon

I use an Eheim canister filter on my 75g. It only has mechanical media in it to remove particles. Activated carbon is counter productive, and useful only if you have a specific chemical contaminate that you need to remove.
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Old 01-26-2021, 07:39 AM   #5 (permalink)
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Default Re: Activated Carbon

Thank you for your replies.
What about my 2nd question, should I use a water director or spray bar or continue to use water polishing unit.
And another question if I may, should I get a CO2 reactor, like Sera 500?
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Old 01-28-2021, 08:10 AM   #6 (permalink)
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Default Re: Activated Carbon

In my filters, I use eheim glass beads and ceramic cylinders. I use poly-fil from the walmart craft section as my mechanical filtration. on my HOB filters, instead of poly-fil, I put a sponge on the inlet pipe to keep the reservoir as clean as possible. I haven't used activated carbon in years. Use Seachem Purigen instead. It's expensive, but it's renewable and works well.
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Old 01-29-2021, 01:36 PM   #7 (permalink)
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Default Re: Activated Carbon

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In my filters, I use eheim glass beads and ceramic cylinders. I use poly-fil from the walmart craft section as my mechanical filtration. on my HOB filters, instead of poly-fil, I put a sponge on the inlet pipe to keep the reservoir as clean as possible. I haven't used activated carbon in years. Use Seachem Purigen instead. It's expensive, but it's renewable and works well.
But doesn't Purigen remove nitrates? If using it do you have to increase your KNO3 dosing?
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Old 01-29-2021, 03:42 PM   #8 (permalink)
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But doesn't Purigen remove nitrates? If using it do you have to increase your KNO3 dosing?
It does, but since you were asking about carbon I was just offering an alternative. If you decide to use it you could watch for deficiencies in your plants and go from there. I defer that subject to someone with more knowledge.
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