hi
i'm working on getting my CYA of 100 down to 50
(i cut pool water with bottled water to get an approximate accurate reading)
in the meantime
i've been keeping chlorine at 25ppm as per ben's chart since aug 2nd.
(i'm keeping it at shock level because i'm still losing about 10ppm chlorine/day)

my concern is whether that level of chlorine will
hurt and/or bleach out my liner ?

i figure the CYA fix will be finished around aug 8-9.

2nd issue:
i'm deciding whether to keep the shock level up over the next
several days while i get the cya adjusted (by drain, refill), or just let it
drop and fix it all up once the CYA is down to 50.

thanks in advance.
max