Thanks people!
Driftwood is indeed called kienhout in Dutch but I never seem to find this in al the stores in the area (even in the big aquarium stores in The Hague). There aren't to many trees over here and it's also very polluted (many cars and dogs) so I'm a little bit cautious to collect it.
Tomorrow I'm going to The Hague to buy another filter for the panaque tank so I'll check the wood department again. But I'm also going on holiday in September. To Serbia and Germany so I definitely fill my car with wood

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So now the only question I have left is: to boil or not to boil

but it's so clean in Germany that I think it's not necessary. In the store's they always say to put it in a bucket of water with a kilo salt for 24 ours......
@Kruseman, I've noticed your ad before. I think Venray is a little bit to far away for some wood but thanks for the offer. I can, however, come by when I'm going to(or coming from) Germany but then again I collect it over there myself.
