Hi everyone! I appreciate any information you can provide as you all seem so knowledgeable. My "new-to-me" pool is a concrete 21,000 gallon pool with a fairly new Hayward pump, filter and a a not as new booster pump for vacuum.

I'm trying to find a pool vacuum that will hook up to my booster pump that will move around the 90 degree angle walls/floors that i have. all 4 sides of my pool are 90 degree angles and according to my hired pool man he installed a Polaris 3900 and then it did not do anything once it hit a wall because it could not backup or move up the wall. I need to find a viable solution to vacuuming the pool than manually. I love doing it but i have a lot going on and can't afford to take the time at this point in my life. Any idea what pool vacuum (automatic or pump driven) would work with the 90 degree angles? Is my pool guy lying?

Thank you in advance!