Personally I would never again add Christmas trees to my pond even if trees were free and someone else put them in. I've seen how fast evergreens and woody branches decay. Plus I try to minimize as much as possible adding all organics which result in more unneeded nutrients in the pond. Fine branched trees and limbs do not last long enough; needles are gone in a year small twigs, branches in about 2 yrs, and large branches only remain for 4-5 yrs. I now prefer the PVC structures which not only do not decompose buy they are very lure snag proof.
