Hi guys, building my own in ground concrete pool, had the plaster done in August, I do not have a winter cover and during a cleaning today I noticed a big crack in the plaster where the pool transitions around a corner from shallow to deep. the pool is not losing water as i have to constantly drain it due to rain. should I be worried? btw.... i am not on good terms with my plasterer as i have been withholding a portion of the payment until they repair tile they cracked and other areas of shoddy workmanship.
Tim
Tim