What is the purpose of Trichlor Tabs ??

[CarlD]

Like anything, Tri-Chlor pucks when used correctly can be beneficial. Tri-Chlor adds about 6ppm of CYA for every 10ppm of chlorine. You can't prevent it--that's how Tri-chlor is made. It also is HIGHLY acidic and can severely lower your pH. When is this good?

An example many new hard-sided pools, while curing, tend to have a steadily rising pH, need Chlorine, and have not CYA yet. Pucks fill all three needs, perfectly

In fact, in any high-pH, low CYA situation, Tri-chlor tabs can be an all-in-one solution. But only temporarily and with regular monitoring of pH and CYA levels.

Di-chlor powder puts out more CYA but is less acidic.

In in a low pH, high CYA situation, bleach works. Cal-hypo can work, but only if the calcium hardness isn't high as well.

But you can just use the bleach and add Muriatic or Dry Acid + CYA powder as well.