I have in the past used mostly wood and only use rocks as Anti-pjerrot suggests, but I am starting to go more with rocks with wood accents, mostly because I think my scapes with only wood lacked something and I have found wood to present a constant battle with BBA, no matter how little light or high light, when all things are optimum, I still always notice it's presence on the wood in some amount.
Also, I now prefer the mixing of the two,
and Though wood has a million character qualities,
I find that Rocks can have a billion
and then the two combined can have a trillion
Just IMO
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