Trichlor Tablet Calculator

How This Trichlor Calculator Works

This calculator estimates how many standard 8-ounce trichlor tablets are needed to raise Free Chlorine. Enter the pool volume and desired FC increase to estimate the number of tablets.

Trichlor tablets add both chlorine and cyanuric acid (CYA). As the tablets dissolve they continuously increase stabilizer, so long-term use changes your chlorine requirements.

Why Trichlor Is Different

Trichlor is convenient because it dissolves slowly, making it popular in feeders and floaters. However, it is very acidic and continuously raises CYA. Excessive stabilizer can eventually require partial draining to restore proper chlorine effectiveness.

Common Mistakes

• Ignoring the rise in CYA.
• Using too many tablets during hot weather.
• Leaving tablets directly on pool surfaces.
• Mixing trichlor with cal-hypo products.
• Never testing stabilizer levels.

Frequently Asked Questions

Do trichlor tablets add stabilizer?

Yes. Every tablet adds both chlorine and cyanuric acid.

Can I use tablets year-round?

You can, but monitor CYA regularly. Many pools eventually need to switch to unstabilized chlorine to avoid excessive CYA.