Member's Mark 3" Chlorinating Tablets, 40 lbs.

Member's Mark 3" Chlorinating Tablets deliver slow, steady chlorine release to help keep chlorine-treated pools and spas clean, sanitized, and algae-controlled with simple, pre-measured dosing.

Consistent chlorine release for cleaner water

These 3" chlorinating tablets release a consistent flow of chlorine to help kill bacteria and control algae, supporting a hygienic swimming or soaking environment. The slow-dissolving format helps maintain sanitization over time without complex measurements.

Individually wrapped tablets for maintained potency

Each tablet is individually wrapped to help maintain potency until use. This packaging supports convenient handling and predictable dosing—use the number of tablets needed for your water volume.

Simple weekly dosing with pre-measured tablets

• For routine care, add 1 tablet per 10,000 gallons of pool or spa water every 5–7 days or as needed, depending on weather and usage conditions.
• For best results, add tablets after stabilizing and balancing your pool’s pH.
• The tablets dissolve on their own and are described as eliminating bacteria and controlling algae without leaving any residue.
• These tablets are described as resistant to sunlight degradation for prolonged sanitization over time.

Important handling notes

• Do not mix these tablets with other chemicals; add the tablets to the pool or spa as directed and allow them to dissolve on their own.
• These tablets can help reduce pH levels, so maintaining balanced water chemistry is recommended.
• The tablets are described as pure and containing no fillers.

Safe handling and storage

Wear gloves when handling the tablets and wash hands thoroughly afterward. Store the 40 lbs. pail in a cool, dry, ventilated area away from moisture, and avoid placing the pail on wet floors to help maintain product integrity.

Frequently Asked Questions

What size and quantity comes in Member's Mark 3" Chlorinating Tablets?

3-inch chlorinating tablets in a 40 lb pail.

What do these chlorinating tablets do for my pool or spa?

They release a consistent flow of chlorine to kill bacteria and help control algae for ongoing sanitizing.

How often should I add Member's Mark 3" chlorine tablets?

Add a tablet every 5–7 days, depending on weather and usage conditions.

How much should I use per dose?

Use 1 tablet per 10,000 gallons of water every 5–7 days or as needed.

Do I need to balance my pool water before using these tablets?

Yes—add tablets after stabilizing and balancing your pool’s pH.

How does the slow, steady chlorine release help with maintenance?

Slow-dissolving tablets provide steady chlorine over time, helping maintain more consistent sanitizing between additions.

Why are the tablets individually wrapped?

Individual wrapping helps maintain tablet potency.

Are these tablets resistant to sunlight degradation?

Yes. They’re described as resistant to sunlight degradation for prolonged sanitization over time.

Do these tablets contain fillers or leave residue?

They’re described as pure with no fillers and formulated to eliminate bacteria and control algae without leaving residue.

How should I handle and store these chlorine tablets?

Wear gloves when handling and wash hands afterward. Store the pail in a cool, dry, ventilated area away from moisture, and avoid placing it on wet floors.