by junior on Tue Sep 13, 2005 9:47 pm
There is no coating and depending on the wood you use. The look will be different in your tank, just be sure to get wood that hasn't been treated with anything, because if so that will leach into your water and possibly kill your fish.
Also be prepared to have your water turn a bit brown as the wood leachs tanin out. This just softens the water, won't hurt a thing but some people think it is unsightly.
thanks
JR