I have 1000's and 1000's of feet of pvc in blue mt lake. they always hold fish.. some more than others but they always hold.. i have one bed that's about 16 ft long 8 ft tall and 12 ft wide that has been in the lake close to 20 years and i can always catch fish off of it.. maybe only a few but its almost a sure thing.. iv never sanded any of the pvc that i put in.