Chlorine tabs by HTH

dank58

Member
Jun 10, 2023
5
Austin
Anyone use these tabs from Costco? I do not want anything with stabilizers to raise the CYA, hopefully these will do it but not sure what the clarifying and algae agents are?

Can’t anyone make a chlorine tab without additives!
 
Chlorine is a gas at room temperature and pressure. It would have to be kept at -151 degrees F to be kept as a pure solid, which is generally not conducive to being thrown in to an 85 degree swimming pool and certainly won't dissolve slowly over the course of a week. To achieve that it needs bound to something and CYA is a good binder of chlorine.

All tabs you'll find in box stores are trichlor and have CYA in them. Some pool stores carry the more rare calcium-hypochlorite tab, but they can't be used in the same feeder as trichlor ever was, some have binders that leave a gooey mess, and you'll have to deal with calcium buildup in your water. There's no magic solution, if you want pure chlorine you have to produce it on-site with a saltwater chlorine generator. Second best option is liquid chlorine which only binds the chlorine using saltwater.
 
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The HTH tabs contain CYA, clarifiers and algaecide.

Chlorine is a gas. It needs to be bound to something in order to make it usable to the consumer market.
For solid forms of chlorine, that is either CYA (Trichlor or Dichlor) or Calcium (CalHypo).
For liquid forms of chlorine, that is water.

The clarifier and algaecide in many tabs is an unneeded extra.

Don't put anything with the word 'Blue' or 'Blu' in tbe pool either. That usually adds copper to the water and can cause staining.
 
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