I was going to ask if anyone thought it would hurt to use a piece of rebar as a weight inside a piece of poly pipe to plug my airstones into when my new air pump gets here. It comes in 10 foot lengths which will string the perfect distance across my 12 foot pool. I was thinking it would get rusty at first because of laying at the bottom of a pool but duh It's going to be encased in plastic pipe and have air blowing through it. I don't see it hurting anything. In theory I can plug as many airstones as I want into the pipe and add more as the old ones become clogged.