ok,i have a problem.I built 5 bamboo condos--one 14 footer--one 17 footer--and three 20 footers.I put them in 5 gallon buckets and put between 19 and 22 bamboo in each and the bucket is slam full of concrete--ran over in fact.went to the lake today and located my spot i wanted to put the 14 footer [in 19 feet of water] and dropped it over the side,and guess what?It only went down about 9 feet!!!!!!!!!!!!the other 5 feet is still above the surface.what did i do wrong?????????need help.