FC has me scratchng my head

[Ecoke]

I'm new to following TFP guidelines...finished my first slam Sunday. Just watchng my FC drift down to my target of 8-10. It's been falling about 4 ppm per day. I wanted to make sure I didn't lose a bit more today and fall below my minimum of 5... so I just tested it. FC was 15 CC O. I also tested at 15 at 8 this morning...we had a partly sunny/cloudy day...about 92 degrees...(central Florida) I expected some burn off...seems odd to me that there was none!

thoughts???

 

[Richard320]

Sunlight more than temperature affects FC. If there's nothing growing in the pool and the sky was grey, you probably lost very little FC, and the tolerance on that test could account for why you don't see a loss.

The precision of the measurement is plus or minus one drop when up to 10 drops of titrant are used, or plus or minus 10% of the final reading, when more than 10 drops of titrant are used.

 

[Ecoke]

Hmmm...we did have sun...I guess not enough...I just was expecting at least a few ppm...I guess this is all part of learning my pool...

Thanks Richard!