I'm not sure if I need to add CYA or what, but my FC levels are low every night. I test every evening after we're finished swimming and then add bleach. My levels get down to 1.5-2.5 generally. It's been a bit cloudy and we've had a lot of kids in the pool, so someone suggested getting it up to 10 the day before and the day after big parties. That had helped with the cloudiness, but the FC still gets low. Am I understanding correctly that it should not get below 4?
Last night's #s:
I tested a couple hours after I put in the bleach and the FC was 10.5. This morning it was 9.5. Tonight, after only me swimming, it was 2.5
It has been Hot here in Seattle (90+), which is unusual for us. Is it possible I should raise the CYA? Should I just try to get the FC levels up higher in the evening?
Is the end of the day the best time to test, or should I test earlier?
Thanks all for your help!