Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I have also seen a method of attaching the wood to something overhead, perhaps strips of fairly thick acrylic. For cleaning the tank, lift out the wood still attached to the top piece. Perhaps a large set up like that would need several such attachment points. (It would look like the roots of several trees)
Another method that works to hold driftwood (especially branches) is to zip tie them together. In a planted tank the ties are low or even under the substrate, and covered with the plants. In a non-planted set up this would be a bit more difficult.