06-12-2008, 02:41 AM
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Any driftwood sold for aquarium use is going to be fine for your aquarium. Just to be safe, give it a boil or two before you put it in your tank. Also, some driftwood isn't waterlogged when you buy it, so you'll have to do that yourself. Just weigh it down with a rock underwater until it sinks on its own. Some driftwood has a pretty high tannic acid content and can stain your water yellowish color and lower your pH some. Usually this isn't drastic and some people go for this effect purposefully. If you don't like it, activated carbon and water changes will get your water back to normal. The boiling process and soaking to get it waterlogged often removes a lot of these tannic acids before the wood even makes it to your aquarium.
Here's a good article on rocks: http://www.skepticalaquarist.com/doc...ng/rocks.shtml
My only warning is that the article says go ahead and boil rocks if you want. However, like the sticky on this site says, definitely DON'T boil your rocks, as they could explode and kill you in a very messy fashion. Instead, I just boil a big pot of water, put all my rocks in a bathroom sink, and pour the hot water slowly over them to kill off any nasty stuff.