I was at two LFS today trying to find a decent piece of driftwood for a decent price, to place in my dreary black painted Koi tank in an attempt to dress it up. All that was available were spindly piece of driftwood for $12 and $27, real dumb looking pieces. So I gave up and on the way home through the desert in my Jeep I noticed all the dead Mesquite trees and remembers I had on in the back yard a small tree truck I pulled out 2 years ago that never made it into the trash. After being in the 115F AZ sun for 2 years all I did was saw it to size, rinse it off and shove two rocks inside the root ball to weight it down. It been neutral buoyant in the corner of the tank now for 2 hours and the slight red tannin is all in the water. Although the PH has dropped from 8 to 7.6 the Koi seem to love nibbling on it, best of all it was free.