Taking over care of parents pool

[CarlD]

I'm not knowledgeable about bromine but your pH is too high. You need to bring it down to the mid 7's. If bromine is anything like chlorine, it's gets far more effective at lower pH levels. Also I have NO idea if you use Cyanuric Acid with bromine and how much. But it sounds like you desperately need to shock the pool. I don't know what will happen if you use chlorine, either.

[FormerBromineUser]

Carl is super correct about getting that pH down. Yes, you can use liquid chlorine/bleach to shock your bromine pool but when testing for shock level, use FC, not Br. My previous history with a bromine pool was that adding CYA actually made things worse.

How old is the water?

[CarlD]

FBU knows bromine (hence her name). So I defer to her on that.

[FormerBromineUser]

Reading your whole thread again, I realized I somehow missed the bit about how old the water is and that you need a replastering job. Sometimes on my phone I scroll too fast. Sorry. Forget that question from the previous page. Get that pH down as CarlD suggested, also on previous page.

Here's a new one: Is the bromine canister called a bromine/chlorine feeder? Is it inline?

Do NOT add liquid chlorine/bleach to your skimmer as mentioned last year with any bromine tabs in that feeder.

Add your chlorine in the evening as the sun will burn a lot of it off during the day. Distribute it evenly around the pool or slowly in front of a return jet in the deep end.

Water that old (1997-2000) that has been treated with bromine can be rather risky. There is a compound called DMH that is used in producing the bromine tabs that never really goes away and just builds up over time. High levels in your pool can cause bad skin rashes.