I don't have any pics right now from my tank, but this is a mirror image of what I have in my tank.
I purchased a 3ft one and they also sold 6ft one's.
This is a pic of the Vine in the rainforest:
I have read they are vines that grow in the rainforest, I have also only found 2 other people on the i-net who have posted the same question as me, and then they woke up and found there fish dead but both people did not know there water parameters.... I decided to take the risk, and its been in my tank for 2 days now and all is fine so far.
I have read also when they are shipped they could be sprayed with some type of Fungicides, to kill any pests etc, so that could have been the reason for fish death.
I am not sure what else I should be looking for rather then fish showing any symptoms, I guess I can re-test my PH later today and see how that is.
If any fish randomly die I will be sure to post it here, encase anyone else obtains some of this root, but I had no where to soak a 3ft piece of wood for weeks, so I just stuck it in and hoped lol.
My LFS did say they use it in there tanks, but I only saw a piece in a show tank not in use, but there was a couple of damp pieces that look like they could of been used, and they been selling this root a couple of years ago I went and still selling it so we will see.