I've got this in my pool wall... I'm assuming it is a return that got clogged? It was left that way after a replaster right before I moved in. I have no leaks, and there is no water movement from that pipe.
- Is it worth getting a cheap USB camera and seeing what's in that pipe?
- I've got 3 other returns (green checks). The only circulation problems I seem to have are stuff not moving to the skimmer from the deep end, and stuff gathering on the bottom about a foot from the main drain. Should I have 4 returns in a pool this size, or is 3 enough?