Bloo
~ I learn something new ~ ~~~~ every day ~~~~
If I may just addto get bogwood ready, you will want to soak it in hot (but not boiling) water for a few days, this just helps get rid of the tannins in the wood which would otherwise stain your tank water a nice piss-wee yellow! hehehe.
Some people just rinse the wood under cold tapwater and put it straight into the tank.
It's those of us (like me) who don't exactly fancy yellow water for several months, that soak the wood beforehand.
It very much depends on the size of the wood, but I sometimes even soak it for a couple of weeks to get rid of the majority of tannins.
If your water still discolours and it bothers you, just do your normal water changes, and this will help to dilute it. You can also add some carbon to the filter to help remove some of the tannins.
A lot of plecs require wood because they chew on the bark (a lot of them have small teeth!) and get special nutrition they need (which cannot be obtained from food).