Getting rid of Tannins? - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 07-29-2012, 05:05 PM Thread Starter
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Getting rid of Tannins?

So I bought some wood from the fish store here (aquarium adventure in Columbus). I don't remember the exact type but i think it was sold as Malaysia iron wood. Now i have had 2 pieces from them. both fairly large and in 30 gallon tanks.

It has been leaching tannis into the water since i got it. I originally had it in the tank for two weeks then took it out to soak it for another two weeks. the tannis was much less but still very noticeable after a day or two.

basically I need a short and long term solution. I want to get my tank looking clear again but I have what some people say are rather delicate fish (German rams) also some shrimp hiding in some moss. How much water should I change out at a time. My tank is probably going on year one now so it is developed biologically. Can i just do a very large like 70-80% change without screwing my animals over. The water at my house is also treated so no chlorine from the tap and i believe we have a water softener as well.

What can i do long term to prevent it from coming back, I really don't like the look of it and it make my tank look very dark for having it lit by two T5HO's.

Thanks, Sean.
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post #2 of 10 (permalink) Old 07-29-2012, 06:05 PM
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Boiling worked the best for me when I was trying to remove tannins from wood. Soaking in cold water did not. The cold water I had my wood soaking in turned a yellowish brown color from the tannins. The water I boiled the wood in turned a dark, rich reddish brown color. With that said, boiling may not completely eliminate your problem but it may help it considerably.
I do not have any experience with German Rams so I cannot advise about such a drastic water change. However, you might consider a daily series of 30% changes for a while instead. I do have shrimp and, regardless of filtration beforehand, I treat with prime and test for TDS and pH with every adjustment. .02

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post #3 of 10 (permalink) Old 07-29-2012, 06:31 PM
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Lots of water changes and lots of purigen
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post #4 of 10 (permalink) Old 07-29-2012, 06:39 PM Thread Starter
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The piece is far to large to boil hahaha.I would need a pot that is as wide as my 30 gallon tank. Also when i say it is filtered before hand it is not by the city we have a filter system in the house to get rid of metals and Cl and a water softener.
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post #5 of 10 (permalink) Old 07-29-2012, 08:09 PM
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I had a piece of mopani that was too large to boil. I found a container it would fit in then boiled water on my stove and put it in with the wood. I covered it with saran wrap and a towel to try and keep as much heat in as possible, and I let it soak overnight. It worked really well for me, and I did this everyday for a week. I still have tannins in the water (which I will probably always have) but it's the color of a super weak tea, and since I do a 30% water change each week it never becomes too noticeable.

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post #6 of 10 (permalink) Old 07-29-2012, 08:12 PM
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The wood doesn't need to be completely submerged to boil it off. If you have a large stock pot you can have it sticking out of the top. Boil it for a while on one side, flip it over and then boil it on the other side.

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post #7 of 10 (permalink) Old 07-29-2012, 08:39 PM
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+1 on the purigen, works really well!
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post #8 of 10 (permalink) Old 07-29-2012, 08:59 PM Thread Starter
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looks like i will need some Purigen then. I just did a 50% change so its mostly clear for now. Hopefully this stuff will keep it clear.

Thanks.
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post #9 of 10 (permalink) Old 07-29-2012, 09:05 PM
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https://www.plantedtank.net/forums/sh...hlight=tannins

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post #10 of 10 (permalink) Old 07-29-2012, 09:43 PM
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Quote:
Originally Posted by Yo-han View Post
+1 on the purigen, works really well!
Purigen is both your short and long term solution.

Be sure to re-charge it before it gets too dirty, i.e. very dark brown/blackish, so it maintains it's effectiveness.
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