high bather load

[Lowertc]

Water looks great with good chemistry. I am expecting a large load of bathers 10-15 HS kids later this week. Should I Bump FC up prior to the event? Currently keeping it at 5 based on my cya level of 60.

any other suggestions?

 

[257WbyMag]

5 is your minimum. This means that at 4.9 essentially, you are unprotected. For a CYA of 60, your FC target should be 7 for day to day operations. For a high bather load, I would bring it to about 8 or 8.5, one hour prior to the party.

 

[JasonLion]

As 257WbyMag said, bump to around 8 to 9 right before the party and then check the FC level as soon as practical after the party and raise it a bit above the minimum then as well.

 

[Lowertc]

Thanks will bump it up prior to the party.

I am using 5 as the FC number as the pool calc is saying Goal: 4 to 8 ? 5 seems to be working? I will go to 6 to see what happens!

 

[JasonLion]

With CYA at 60, the recommended level is either 5 to 7, or 5 to 9, depending on which source you are looking at. CYA at 50 is 4 to 8.

 

[Lowertc]

my bad CYA is 50!!!

Al I do know is that I am going thru lots of CL.. Dropping to around 2.5-3 each check then adding to bump up!

I was questioning in an earlier post on cost... Might be cheaper for me to do Cal Hypo.. My CH is 220

60.00 for a 25lb 48%

 

[JasonLion]

Most of the time the best available price on cal-hypo is more than the best available price on bleach, for the same amount of chlorine added. But sometimes there is a big sale on cal-hypo, or you can't find a good price on bleach, and it goes the other way. That isn't an especially good price for cal-hypo, so I suspect that bleach is less expensive for you, at least if you hunt around for a good price. 25 lbs of 48% is equal to about 16 large (182 oz) jugs of 6% bleach, at $60 gives a break even price of $3.75 per jug of bleach. There are several people on the forum who are finding bleach for around $2.20 for a 182 oz of 6%.

With CYA at 50, I would expect you to lose about half of your FC each sunny day. That will vary somewhat from pool to pool, but something in that area.

 

[Lowertc]

Great, I am loosing just about that!! Has been warm and Sunny here since opening!