Calcium Chloride - Need to add about 72lbs

[burgerking089]

My CH is sitting at around 150ppm and trying to raise it to 300ppm. I've been reading here that you can just go to a hardware store and buy calcium chloride. Is this safe to use? https://www.homedepot.com/p/Unbranded-50-lb-Calcium-Chloride-Ice-Melting-Pellets-7892/202590325

Price per pound difference is ridiculous?!?

1.39 / lb
vs
.40 / lb

 

[Richard320]

Yes, that's the stuff. Even the SDS says it's 100%

 

[tomfrh]

72 lbs? How big is your pool?

 

[burgerking089]

72 lbs? How big is your pool?

InTheSwim said I needed 72lbs but looks like I only need 56lbs (according to PoolMath). What a rip off these pool shops are... this is going to take me 1/4 of the cost. Thank you!

 

[JamesW]

The difference is using calcium chloride dihydrate vs. calcium chloride.

CaCl₂·2H₂O vs. CaCl₂.

CaCl₂·2H₂O is usually labeled at 77% to 80% CaCl2.

The dihydrate has two water molecules attached to each calcium chloride molecule. So, part of the weight is water.

Is your pool 40,000 gallons?

That's a really big pool. Make sure before adding anything.

What are the dimensions of the pool (length, width and depth)?

 

[tim5055]

Please tell me you don’t have a vinyl liner pool......

 

[burgerking089]

The difference is using calcium chloride dihydrate vs. calcium chloride.

CaCl₂·2H₂O vs. CaCl₂.

CaCl₂·2H₂O is usually labeled at 77% to 80% CaCl2.

The dihydrate has two water molecules attached to each calcium chloride molecule. So, part of the weight is water.

Is your pool 40,000 gallons?

That's a really big pool. Make sure before adding anything.

What are the dimensions of the pool (length, width and depth)?

Rectangular 20'x40' with deep end being around 10' and shallow 4'

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Please tell me you don’t have a vinyl liner pool......

Plaster pool

 

[tim5055]

Plaster pool

Thanks!! Many pool stores will also tell folks they need to add lots of calcium to vinyl pools......

 

[JamesW]

The pool is probably closer to 30,000 gallons. Add half of the intended amount and retest in a few days.

Brush and circulate well.

 

[briwill]

To bad you aren't close to me, i have a whole bunch of the Clorox brand that was given to me, i have an above ground pool, so it is no use to me

 

[Household6]

To bad you aren't close to me, i have a whole bunch of the Clorox brand that was given to me, i have an above ground pool, so it is no use to me

Define a “whole bunch.”
I might just take that off your hands if you’re serious. (I’m in Fayetteville.)

 

[briwill]

Define a “whole bunch.”
I might just take that off your hands if you’re serious. (I’m in Fayetteville.)

I'll have to look in the cabinet when i get home, but i probably have at least 6 of the 5 pound jugs

 

[Household6]

Rectangular 20'x40' with deep end being around 10' and shallow 4'

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Plaster pool

We have a 20x40 with 3.5’ to 11’. And 36k gallons seems to work for us.

 

[Household6]

I'll have to look in the cabinet when i get home, but i probably have at least 6 of the 5 pound jugs

That would certainly be worth a 30 minute drive. SCORE!

 

[briwill]

That would certainly be worth a 30 minute drive. SCORE!

I work in Fayetteville so you probably wouldn't even have to drive far, I'll count them when i get home tonight

 

[briwill]

That would certainly be worth a 30 minute drive. SCORE!

I sent you a pm

 

[getreal720]

What are you currently using to chlorinate the pool?

If your not using a SWG, you can simply switch to CAL-HYPO granular chlorine. It will take a little bit to get up to where you need to be, but unless it is urgent that you get to the target level very soon... using 50 pound buckets of cal-hypo is a pretty good way to accomplish both chlorinating the pool and bringing up CH gradually. A single 50 pound bucket of 73% will bring up about 100ppm CH. Two buckets puts you just a bit above your target. If your paying for chlorine pucks (the stuff with stabilizer in it is a no no) or bleach, the Cal-Hypo powder can save you money in chlorine costs and you get the free CH as a by product of the chlorination method. I no longer use Cal-Hypo (above ground pool with vinyl liner) but last year when I did I was paying about $85 for a 50 pound bucket of 73%