Chorine usage high

[Chrissykr]

Since the temps started dropping I have been using higher amounts of chlorine than past years. The pool looks great and all my numbers are in line.

Results from yesterday:
CL 6
CYA 40
TA 60
CH 75
Ph 7.2

My pool has looked fabulous and have passed every OCLT all summer long. Yesterday I had to change my weir door and the old one had a small amount of algae on the foam which surprised me. Today, the pool company blew out my main drain for closing and holy cow the stuff came flying out. I was shocked I have never seen this before when they closed. The drain was working as normal and I had no idea it had so much grass and leaves were down in there. I checked that ladder ends after they pulled it and didn't see any green, other than pulling the light next year I don't know what could have caused this daily usage.

Could these things have been causing the higher chlorine usage?

 

[mknauss]

Yes.

Be sure to open very early next year. You want to do an opening SLAM Process well before your water temperature reaches 60F.

Take care.

 

[Chrissykr]

Yes.

Be sure to open very early next year. You want to do an opening SLAM Process well before your water temperature reaches 60F.

Take care.

Thnx, I always open early (March 30, 2018, already scheduled) and close late. The water temp should still be in the high 40's or low 50's when I open.

 

[AftonJeeper]

The drain was working as normal and I had no idea it had so much grass and leaves were down in there.

I wouldn't think the main drain is working "normal" if it is allowing debris to build up in the line. You might want to make sure it is working properly when you open next year. Close off the skimmer(s) if possible and see if the pump continues to work.

My guess is there is more junk in the line, possibly trapped by the main drain cover now, causing your higher than normal FC consumption.