My family and I moved to a home with a pool this past summer. This is our first pool and the TFP website has been an invaluable resource to us in learning our to take care of our pool!
Over the summer, we hired a pool tech to come to our property and explain how to keep up our equipment. Most of her advice jived perfectly with that given here (and she was so excited to see that we use a Taylor test kit).
One problem that she noted, and became quite obvious to us after she pointed it out, is that the concrete under our vinyl liner is very damaged. The entire floor of the pool is covered with divots and pock marks, and one section has a 1 or 2 foot wide hole that is a few inches deep. Her opinion was that the polaris robot that came with the pool is at fault. She said that she has seen this a lot, and that the movement and pressure of the wheels erodes the concrete over time. She usually suggests that owners of vinyl covered concrete pools hand vacuum.
I've searched around on the forum a bit and haven't seen this kind of complaint in any other threads. Any thoughts on whether this gal is on the right track or what could be causing the damage to our pool?