Greenish “mud” on water level liner.

livelox

Well-known member
Jun 13, 2019
95
Cyprus
Hello everyone.

Livelox here.
I have came across this greenish lines around the levels of the pool water on the liner.
I can scrub them off with a little bit of pressure scrubbing by hand.
I believe it has something to do with my hardness levels ? Or iron or something ?

FC pH CYA is at normal levels. TA is at 200ppm and slowly getting down.
Thank you everyone.