Question:
My pool is just a year old. water has been tested and everything is in line. but my pool liner has crystal clear appearance in the middle about 6 foot in diameter and the rest of the liner look greenish. the pool has been swept and brushed yet the blue/green outer part wont look like the middle of the pool
Answer:
The greenish appearance could indicate algae. Have you tried an algaecide in addition to your chlorine to help to clear up the problem?