I soaked a piece of driftwood for 2 months. i also poured about 3inches of concert in the bottom of it. Its still freakin floats!!! what can i do to make it sink for good.
try drilling a few flat rocks to it. or putting some rocks on top of it within the tank - aquascape it so it looks nice. make sure it's secure with the rocks, though, so that it doesnt pop up and mess up your tank.