FC - Free Chlorine = 3
CC - Combined Chlorine [don’t know]
pH = 7.5
TA - Total Alkalinity = 95
CH - Calcium Hardness s [don’t know]
TH = 550
CYA - Cyanuric Acid (stabilizer) = 40
Pool size = 24,000
DE filter Nautilus 60
I G pool
I have read TFP for 2 months and my pool has never looked better for crystal clarity but there is a stained wall problem. I have attached a picture of the stains.
I read the BBB method but so far it has just been B [bleach] because Ph is rock solid.
We went on vacation for a moth this spring and when we came back there was algae [black?] on the walls. I shocked it and applied True Green and killed the algae. The walls seem to be stained and it won’t brush off.
There is some pitting and I have even rubbed a Chlorine tablet on some spots and it improves the situation some but it seems to be as good as it gets. I tried a vitamin “C” tablet and it seemed to help slightly but no miracle cure. I don’t want to drain the pool and/or do an acid wash. I am afraid the acid wash will damage the plaster.
If my memory serves me right the sides and bottom used to sweep right up with the steel brush but it seems permanent this time. Brushing seems to do no good.