this has been in my tank for a 2 months heald down by a big rock (in pic) by mono. im scared to cut the mono and see if the wood still floats. so i want you guys opinion, how long do you think this wood will take to become waterlogged?? i DONT want to cut the line just to have it float up to the top and back to square one. do you think i should risk it? any way to tell by the exterrior? i reeeeeeely want the big rock and the d wood by itself. for reference the tank is a 90 and the wood is a good 10in thick in the thickest part.