How long does it take for the wood to get soaked in water & finally sink? I ordered some rather large pieces (30"+ and some 4-5" thick). Anyways, I boiled them...or most of them by the piece, have them floating 3-4 days in separate tanks and finally dump them in my 300 gal tank. Some of the larger pieces have been floating there 5 days & I'm running out of patience. I would hate to weight them down, since this might take some of the natural look away...but what choice do I have? Anybody else had problems with stubborn manzanita wood?