It is normal. Cork barks and Cholla wood will turn the water brown or red. I think it has to do with the chemicals in it or something like that but that happens when I put cork bark in water without a filter.
Boiling it will help speed the process but certain woods will always leach tannins into the water. It should also be noted that Cholla wood is a dry dessert wood and not the best choice for moist or wet set-ups.
bought 3 big pieces and two small pieces of the stuff and can't even use it :nonoi don't have the option to try to boil it ..don't ask) its a shame maybe the one piece i tried will dry out and still look normal enough to take back to the store thanks for all the help guys
Next time, be sure to check if the wood is suitable for aquariums. If it's being sold in the reptile area, or the bird area, it might not be. For example, grape wood is NOT good for aquariums. And even good aquarium driftwood will leach tannins into the water. Either you have to tolerate the appearance (the brown water color isn't harmful), or you have to pre-soak it for weeks, possibly months.
From doing some googling, it appears that cholla wood may be perfectly OK for aquariums. It might take some time for it to sink and lose the tannins. Just put it in a bucket of water, change the water occasionally, and use it next year! http://fishforum.com/viewtopic.php?t=3856&highlight=cholla
I also googled up some commercial sites with ads for cholla wood for aquariums, but I'd prefer not to post commercial links - if you're interested, you can google them up I'm sure.
You can use the Cholla wood but it will rot faster than cypress or other hard woods. Having said that you could weight it with a few rocks and stick java fern in the holes. It should grow quickly and by the time the wood rots you woun't be able to see it anyway.
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