Originally Posted by Blackfeet
Really?, avoid the salt? I would have thought the salt would help to keep toxins from penetrating too far, also I am thinking of this for my brackish tank so salt is of no issue. So where do the suppliers of the store bought stuff get theirs and how it is "purified"?
Thanks on the cement thing there are a couple plants near me that I can talk to. The only downside is it is all gray
In a brackish setup, salt is obviously not a concern. The best wood for this would be mangrove root, since it occurs in brackish estuaries in SE Asia and obviously is not affected as much by salt as some woods might be (salt is corrosive). This used to be available but I have not seen it locally for years; might be online somewhere.
Salt would have no effect on toxins like pesticides, fertilizers, oil, gas, chemicals... etc. I've no idea how commercial wood is treated or prepared. But I will say that I did once have an issue with one chunk. But that was partly my fault, it was soft and I now know that one should never put softwoods into the aquarium. First, they rot much faster. But being soft, they also tend to absorb toxins more. No idea what was in mine, but fish were lethargic and slowly died over weeks and i could not discern the cause, until a professional aquarist suggested it might be the wood. It was; obviously some toxin was in the wood and after it had been in my tank for nearly a year it began to leech out.
I now use Malaysian Driftwood which has so far not been a problem in any way. I had one piece of the lighter wood, it may have been Mopani, grapewood or manzanita, and white fungus appeared which killed some fish. This is not all that uncommon, several members here have had this problem, so I avoid these woods.