I have a A&A QuikSkim venturi skimmer. This is the pipe of the venturi section. Basically on the return there is a pipe that flows water through the skimmer and out this pipe that is installed in the pool. There is discoloration around this pipe. I am not sure if this is rebar that is rusting under the surface or not. I have smeared a lemon over it and it doesn't seem to remove the discoloration. If you look closely at it then it looks like it may be some kind of sealer around the pipe that has discolored it? Would rust stick to the sidewall of a pvc pipe in that way? Any input on if this is an issue and if I should do something about it?
