I tried to search for a string on this topic, but I was unsuccessufl. If it has already been addressed, I apologize, and please point me to the discussion. But, is there a link between low FC and low Ph? Over the past couple of days of extremely high heat here on the East Coast, our FC level has been very low in the evenings, and our Ph has been dropping. We've shocked, and the FC comes back up, but by the next evening, it is low. Last night, both FC and Ph were low. I forget the FC level, but it was the lowest level on our test strip, and the PH was 6.4. We shocked with cal hypo and we added 3 lbs of soda ash. This morning, the FC is 20 and the Ph is 8.4. Now, the water is cloudy, but I suspect that is from the cal hypo and maybe even a little undissolved soda ash. Our filter will clear the cloudiness, right? Thanks, in advance, for any adivce you've got!