Cyanuric acid

[1976colette]

Hey, first post here. I'm in canada, my season for pool is wrapping up. My cyanuric acid level is high. Closing in a few weeks but how can I prevent this next season? I'm using Poolboss Super Tabs and feel they may be to blame. Advice please on how to prevent thos in the future.
My water is clear, chlorine levels are fine.. just cyanuric acid.. ugh

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[Teapot]

Don't worry this side of closing, over winter the cya may reduce. Best to measure on opening.
Switch to using a strong bleach, you must have a supply somewhere around you.
It doesn't matter what silly name they have almost all packaged chlorine except calcium hypochlorite is stabilised even shock.

[1976colette]

Don't worry this side of closing, over winter the cya may reduce. Best to measure on opening.
Switch to using a strong bleach, you must have a supply somewhere around you.
It doesn't matter what silly name they have almost all packaged chlorine except calcium hypochlorite is stabilised even shock.

Use bleach? For what.. sorry, I'm relatively new to the pool care.

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[Teapot]

Bleach is a source of chlorine for pools. Ordinary unscented thin bleach, cheap bleach is quite weak being around 3% chlorine compared to commercial grades 9.6 to 14% chlorine so the amount you need to add to get your free chlorine level up varies. How high is your CYA level?

[Denniswiseman]

Search for "Sodium Hypochlorite" you may be able to get it at 14.5% in 20 litres
Don't get to much as it degrades over time to a lower strength

[Teapot]

If you are in a French speaking part of Canada, try eau de javel