If you can fit it in a pot to boil it then do it. I filled my bath with hot water and left it in there. I tried to keep the water hot for a about a day, but when i put the wood in my tank water still went brown. I reckoned it helped a lot though, judging from how brown the bath water got! Not only is it to reduce the tannins that come from the wood, it makes sure it doesnt float!