Here is the first peice, its thinner and seems to be a harder wood.
A close up of the same wood
This is another peice, a bit chunkier, and seems to be a little less dense
closer
and closer again
I havent decided on the final design of the tank so i still dont know which peice i prefer in terms of the look i want but if one is more suitible then i will err on the side ofcaution and use that peice, currently #1 looks to be the peice more suited to tank life