Bucket Testing

[Watermom]

Any idea what your CYA was when you closed the pool last fall? My guess is that your CYA has biodegraded over the winter and created a lot of ammonia as a byproduct. This causes a huge chlorine demand. We see this scenario all the time, unfortunately.

Directions for doing the bucket test are here:> http://pool9.net/bucket-demand
Your best bet is to just use bleach as your source of chlorine. Walmart's generic 8.25% bleach is fine.

What kind of test kit do you use?

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[PoolDoc]

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Chlorine demand test => http://pool9.net/bucket-demand/