Get out your math book. Figure out how many gallons of water they will hold. Each gallon of water weighs 8.3#. If you have them half submerged, then they will support roughly 1/2 of the weight of the gallons of water they will hold. (i.e. if they will hold 200 gallons, then 50% submerged they will support 830#). You need to figure out how much your pier will weigh too, plus the maximum # of people you expect to have on the pier at one time.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).