I just sit heavy décor that's already in my tank on top of my not sucken wood (in such a way that they don't fall!) and dig it into the substrate where possible. By the time I remember that there's a reason my scape looks funny, the wood has sunken.
I've only sunk three bits of wood and only two were in tanks, and technically one still floats if I take the rock and other wood off it.. But I thought I'd share anyways.
I've only sunk three bits of wood and only two were in tanks, and technically one still floats if I take the rock and other wood off it.. But I thought I'd share anyways.