Pool Water Turned Green

We wanted to bring the 2 older girls down for a dip in the pool but when we saw that the color of the water had changed from bluish to greenish, we freaked out. The pool pumps must have been spoilt. But a few residents were still seen swimming in the pool, unfazed by the scary condition of the water. After 2 days, the entire pool was cordoned off while repair works were being done.