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Old 12-03-2016, 09:27 AM   #1
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Removing tannins in a pond?

Suggestions? Will purigen remove tannins and can I get enough for a 55 gallon filter at a decent price? I still need better sponges for it, but I get a lot of leaves in the fall so the water is tea colored and you can't see the bottom.
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Old 12-06-2016, 08:26 PM   #2
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Hi, did you up end up buying the purigen?
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Old 12-06-2016, 08:47 PM   #3
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No. I never got a response here. Does purigen remove tannins?
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Old 12-06-2016, 09:24 PM   #4
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Yes, it does. However, you may need quite a bit of it to do any good. I fully saturated a 100 mL Purigen pouch with driftwood tannins in a 20g tank over a short period of time.
A better investment for next season might be a bird net (possibly in a frame) to spread over the pond. This should catch a majority of fallen leaves.
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Old 12-06-2016, 10:31 PM   #5
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Yes, it does. However, you may need quite a bit of it to do any good. I fully saturated a 100 mL Purigen pouch with driftwood tannins in a 20g tank over a short period of time.
A better investment for next season might be a bird net (possibly in a frame) to spread over the pond. This should catch a majority of fallen leaves.
The pond is located under two oak trees to protect from birds in the summer. I put up netting in the fall, but the leaves still end up in the pond until I pull them out with the net.
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Old 12-26-2016, 07:49 AM   #6
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Would barley straw help?
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Old 12-26-2016, 09:12 AM   #7
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I couldn't find anything to suggest it would just looking on the internet. Would activated carbon be possible? Say in a mesh bag at filter outflow.
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Old 12-26-2016, 09:22 AM   #8
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Would barley straw help?

I've used that to combat free floating algae.
I googled it and a few hits mentioned activated carbon. I did not note the amount per gallon needed. At that rate, you could try 1 or 2 100 mL bags of Purigen (I know I mentioned the cost effectiveness earlier).
I do wonder if the tannins will decrease over time assuming all leaves have been removed from the water.
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Old 12-26-2016, 09:55 AM   #9
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That's all I could find as well on the straw combating algae. There have been threads on this but only had a quick look.
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Old 01-01-2017, 09:15 AM   #10
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Yes purigen will remove tannins. so will Poly-Fiber by bio marine. i would use both.
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