Chlorine Tablets: Essential Daily Sanitation for Pools & Spas

When it comes to pool maintenance, nothing is more important than consistent, reliable sanitation. Chlorine tablets are a popular choice for homeowners and professionals. They release chlorine slowly and steadily. This keeps water clear, safe, and ready for swimming.

At Benchmark Pool Supply, we offer high-quality 1" and 3" stabilized chlorine tablets. We carry trusted brands like GLB, Poolife, and Applied Biochemists. You can buy them in bulk pails or smaller containers. You can find the right option for your needs. This collection offers precise dosing for a spa. It also provides long-lasting protection for a large in-ground pool.

👉 Browse our full line of Pool Chemicals and pair tablets with Shocks & Oxidizers for a complete sanitation routine.

Why Chlorine Tablets Work Best

Chlorine tablets offer several advantages over liquid chlorine or granular treatments:

• Slow, controlled release keeps chlorine levels steady day after day

• Stabilized with cyanuric acid (CYA) to prevent chlorine burn-off from sunlight

• Versatile application in feeders, floaters, or skimmers

• Safer handling with compact, uniform tablets

• Convenience: fewer applications, less guesswork

Choosing Between 1" and 3" Tablets

Not sure which size to buy? It depends on your pool size and equipment:

• 1" Tablets

  • Faster dissolving

  • Ideal for spas, hot tubs, and small above-ground pools

  • Better for feeders and floaters needing precise dosing

  • Popular picks: GLB 5LB 1" Tablets, Poolife 1" Cleaning Tablets

• 3" Tablets

  • Longer lasting (5–7 days per tablet)

  • Perfect for large residential and commercial pools

  • Compatible with feeders and skimmers

  • Popular picks: GLB Triple Tab, Applied Biochemists 3" Tablets

Featured Brands

GLB

A professional-grade line trusted for decades. Choose GLB Triple Tab for long-lasting 3" sanitation or the GLB 5LB 1" Tablets for smaller pools and spas.

Poolife

Known for convenience and consistency, Poolife 1" Cleaning Tablets are a favorite among spa owners and small-pool users.

Applied Biochemists

For serious chlorination needs, Applied Biochemists 3" Tablets offer a strong, slow-dissolving formula. It is perfect for large pools that need a steady supply of chlorine.

Best Practices for Using Chlorine Tablets

1. Test water chemistry weekly — target pH 7.2–7.6, alkalinity 80–120 ppm, and stabilizer 30–50 ppm.

2. Place tablets in a feeder, floater, or skimmer basket (never directly on pool surfaces).

3. Maintain chlorine levels between 1–4 ppm.

4. Add fresh tablets every 3–7 days depending on size, water temperature, and bather load.

5. Shock weekly with a Cal Hypo Pool Shock to oxidize contaminants and restore water clarity.

Internal Comparison Chart

FAQs

How many tablets should I use per week?
Use roughly 1 tablet per 10,000 gallons of pool water each week, adjusting for sunlight, bather load, and temperature.

Do chlorine tablets raise stabilizer (CYA) levels?
Yes. Trichlor adds CYA, which protects chlorine from sunlight. Keep levels between 30–50 ppm. If they rise too high, partially drain and refill with fresh water.

What’s the difference between tablets and shock?
Tablets provide slow, steady daily chlorination. Shocks (like Cal Hypo Shock) are used periodically to oxidize organics and kill algae.

Can I use chlorine tablets in a spa?
Yes, but only 1" tablets like Poolife 1" or GLB 5LB 1" should be used in spas and hot tubs.

Where should I put the tablets?
Always in a feeder, floater, or skimmer — never directly on pool surfaces, as that can cause bleaching or damage.

Shop Chlorine Tablets Today

• ⭐ GLB Triple Tab – 3" Tablets

• ⭐ Applied Biochemists 3" Tablets

• ⭐ GLB 5LB 1" Tablets

• ⭐ Poolife 1" Cleaning Tablets

Looking for other ways to balance your water? Explore Pool Chemicals and Shocks & Oxidizers to complete your maintenance routine.