We have a new pool build - pool plastered and filled the second week of May. Since then, spots have developed in a small area near one of the drains that appear to be a dime sized hole in the Pebble Tec (dark spot in second picture) and / or thin spots in the Pebble Tec that are turning brown. Are these holes and thin spots, how big an issue is this and what should I expect to be done to fix it when I report it to the PB? Thanks in advance for your help.
