Hi Becca, Thanks a lot and sorry for the delay in replying. I didn't see it and have been swamped at work.
The two perspectives on this are interesting. One camp says no, and another says if it has been waterlogged and no longer smells, it is fine especially if you have good filtration. AH!! I talked with a few people who have red cedar and none of them have had any problems. I think I am going to set up a dummy tank with a few gold fish and danios and put it there and let them play canary in a coal mine.
I will let you know what I discover.
Thanks a lot.
Ted