Got a problem with the wood I just added. There appears to be slime that starting to cover the open end. You can see the open end that is still live in the picture. This piece of wood was found in a lake and treated thouroghly to cleaning it prior to placing it into the tank. I did a search and found that the wood may be rotting and will continue to develop this slime. Some said that it is harmless and plecos will eat it otherwise just whipe it down when doing water changes. Maybe I'll get a picture tomorrow.