How long does it take for clorox tablet to fully dissolve?

nikon5400

Well-known member
Jul 20, 2013
239
Northeast
How many tablets do I need in the chlorine floating dispensers (plastic ones form Walmart ) to get about 3-4ppm of FC into my pool daily. Pool is about 23k gallons.

I have not used tablets in years, but happen to have them and out of liquid.

Thanks

P.S. Why I don't want to buy more liquid - pool company I ordered cover from offered to put it on for free. I don't have slightest idea when it's going to happen, but I'll take free... that's why I don't want to get boxes of liquid chlorine not knowing how many I need
 

ajw22

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Jul 21, 2013
29,068
Northern NJ
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Do your Clorox tablets say "Blu" or "Blue" on the label? If so they contain copper and will add copper to your pool water. Copper will accumulate in your pool water and can turn blonde hair green and eventually cause stains in your pool. The only way to get the copper out of the pool will be to drain it.

We don't recommend using products labeled Blu with copper int hem.

 

nikon5400

Well-known member
Jul 20, 2013
239
Northeast
Do your Clorox tablets say "Blu" or "Blue" on the label? If so they contain copper and will add copper to your pool water. Copper will accumulate in your pool water and can turn blonde hair green and eventually cause stains in your pool. The only way to get the copper out of the pool will be to drain it.

We don't recommend using products labeled Blu with copper int hem.

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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,355
Laughlin, NV
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Pentair Intellichlor IC-40
To get 3-4 ppm FC in your pool each day you need to dissolve 12 oz of trichlor, each day. That is 1.5 3" tablets. It very unlikely you will get that with a floating dispenser.

If you wish to do this, fill the dispenser up. Most take 5 tablets.

Those tablets have copper sulfate in them.
 

ajw22

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Jul 21, 2013
29,068
Northern NJ
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Yup, those Clorox tablets have copper in them.

I would not use them.

Use at your own risk. I am sure you can find liquid chlorine or bleach with no additives around. Or get regular trichlor tablets without copper. Anything but that!
 

nikon5400

Well-known member
Jul 20, 2013
239
Northeast
Do your Clorox tablets say "Blu" or "Blue" on the label? If so they contain copper and will add copper to your pool water. Copper will accumulate in your pool water and can turn blonde hair green and eventually cause stains in your pool. The only way to get the copper out of the pool will be to drain it.

We don't recommend using products labeled Blu with copper int hem.

To get 3-4 ppm FC in your pool each day you need to dissolve 12 oz of trichlor, each day. That is 1.5 3" tablets. It very unlikely you will get that with a floating dispenser.

If you wish to do this, fill the dispenser up. Most take 5 tablets.

Those tablets have copper sulfate in them.
Considering I'll be closing pool anytime between now and mid October and haven't used tablets in about 10 years, do I need to worry about cooper?

I have a few dispensers I could fill, I just want to make sure I get 3-4ppm on sunny days and at least 2 otherwise

thanks
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,068
Northern NJ
Pool Size
35000
Surface
Plaster
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Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Considering I'll be closing pool anytime between now and mid October and haven't used tablets in about 10 years, do I need to worry about cooper?

Copper accumulates in the water. Once the copper gets into the water the only way to remove it is a complete drain.
 

tim5055

Mod Squad
TFP Expert
LifeTime Supporter
May 11, 2014
11,177
Franklin, NC
As others have pointed out, the tabs have copper. But, between now and when you close in 5 or six weeks you will probably not get to staining levels. I'm not sure what cover you are getting and you say "northeast" for your location so I'll bet you will get lots of snow/rain water in the pool over the winter. You will most probably pump water out for this reason so the use of those tabs are probably not the end of the world.
 

nikon5400

Well-known member
Jul 20, 2013
239
Northeast
As others have pointed out, the tabs have copper. But, between now and when you close in 5 or six weeks you will probably not get to staining levels. I'm not sure what cover you are getting and you say "northeast" for your location so I'll bet you will get lots of snow/rain water in the pool over the winter. You will most probably pump water out for this reason so the use of those tabs are probably not the end of the world.
solid cover. I hope I won't get as much water as I used to with old cover which had lots of holes and tears
 

nikon5400

Well-known member
Jul 20, 2013
239
Northeast
Just curious - any other chemicals have these types of hidden side-effects?
I can borrow calcium based shock, another product I haven't used in 10 years. I'm always low or at the lower range on calcium, so this product would be somewhat useful.
I just want to avoid buying liquid only because I don't know how much I'll end up using, a few bottles or a few dozen.

thanks.
 

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tim5055

Mod Squad
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May 11, 2014
11,177
Franklin, NC
The hidden minerals in some of the products (copper and silver) is hard to determine at times. As others have pointed out here, the terms "blu" or "blue" in the product name is the most common way to know there is copper.

If you are at the lower end of recommended calcium then a calcium based chlorine product may be a good way to add chlorine and calcium at the same time. I wouldn't go out and buy it as I prefer to add things in their native form and stay away from combination products. But, if you have access to it, why not.

When we talk about almost any of these products we really are not against their use. We are against their uncontrolled use. If you understand what each product brings to your pool water and use them properly there are usually no issues.


So, TFP is not "against" anything - it's "for" knowledge. The knowledge is condensed in the Pool School.

Under normal circumstances, these three articles are what should guide most folks:



 
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Bperry

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Aug 20, 2020
1,002
Knoxville, TN
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Just curious - any other chemicals have these types of hidden side-effects?
I can borrow calcium based shock, another product I haven't used in 10 years. I'm always low or at the lower range on calcium, so this product would be somewhat useful.
I just want to avoid buying liquid only because I don't know how much I'll end up using, a few bottles or a few dozen.

thanks.
I don’t understand the liquid chlorine issue. Why not buy a few bottles now and if you need more, but more? Or is every hardware store and Walmart out of it out there?
 

tim5055

Mod Squad
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May 11, 2014
11,177
Franklin, NC
I don’t understand the liquid chlorine issue. Why not buy a few bottles now and if you need more, but more? Or is every hardware store and Walmart out of it out there?
I know I'm having to go to different grocery stores because it's not uncommon for one to be out.
 

Bperry

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Aug 20, 2020
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Knoxville, TN
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I know I'm having to go to different grocery stores because it's not uncommon for one to be out.
Grocery stores makes sense to not have chlorinating liquid but hardware stores and Walmart always have tons of it here. Grocery stores here don’t have that kind of thing. I know when some people first hear about using “bleach”, you might assume that was the same as the stuff you get at the grocery store, but the more appropriate stuff is at the hardware store. (At least out here). Of course it sounds like you actually used to be able to get the kind of plain bleach that’s ok to use in a pool at grocery stores but that’s getting to be no longer the case. (I didn’t have a pool until a few years ago and so I don’t have a history in that kind of expectation).
 

tim5055

Mod Squad
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May 11, 2014
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Franklin, NC
I know when some people first hear about using “bleach”, you might assume that was the same as the stuff you get at the grocery store, but the more appropriate stuff is at the hardware store. (At least out here).
It is the exact same chemical composition, just at a lower concentration. I use grocery store bleach and have for many years.

Unfortunately, many hardware store have two issues with their liquid -

- The store it in outside garden which can get too hot at times

- They are slow sellers, so you end up with old product. I know when I've looked at a date code in some hardware stores I've found stuff 6 - 8 months old. One Home Depot I looked at it was from last year.
 

Bperry

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It is the exact same chemical composition, just at a lower concentration. I use grocery store bleach and have for many years.
Much of the grocery store stuff now has fabric softeners, purfumes, Cloromax, etc that you don’t want in the water. If you can find plain old bleach, then I’d agree.
 

tim5055

Mod Squad
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May 11, 2014
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Franklin, NC
Much of the grocery store stuff now has fabric softeners, purfumes, Cloromax, etc that you don’t want in the water. If you can find plain old bleach, then I’d agree.
Yup, I'm well aware of it. At this point I do know which bottle to pick up.
 

nikon5400

Well-known member
Jul 20, 2013
239
Northeast
I don’t understand the liquid chlorine issue. Why not buy a few bottles now and if you need more, but more? Or is every hardware store and Walmart out of it out there?
I ended up getting last 12 bottles from the closest store which had it. $3 for 12.5% is a bargain these days even if I get to use it next year (my 12.5% austin was ~~8% 9 months later)
thanks.
 
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