3in Stabilized Chlorine Tablets for Pools - Slow Dissolve 50 lb

In this review the C3... 3in stabilized chlorine tablets prove to be a straightforward option for pool owners who want a low-effort chlorine program. The bottom line: these slow dissolving, individually wrapped tabs are ideal for weekly dosing in floating feeders or automatic chlorinators and deliver reliably clear water because they contain stabilized chlorine with cyanuric acid. The review finds them especially useful for owners of above ground or inground pools who prefer a large supply delivered in a single 50 lb bucket or two 25 lb buckets when available.

Key Features

• Concentration: The formulation uses 99% Trichloro-S-Triazinetrione with 90% available stabilized chlorine to provide a potent, long lasting sanitizer for routine maintenance.
• Slow dissolving tablets: The 3in tablets dissolve slowly so a single dose can maintain chlorine levels for up to a week, reducing how often you need to add sanitizer.
• Individually wrapped: Each tablet is wrapped to limit moisture exposure and make handling and storage neater, while still being easy to place in feeders or skimmers.
• Versatile application: Tablets are sized for floating feeders, automatic chlorinators and skimmers, allowing flexible use in above ground or inground pools.
• Large supply: The 50 lb bucket (may ship as two 25 lb buckets) gives a long season of coverage and fewer repeat purchases.

Who It's For

This product is best for backyard pool owners who want a simple, weekly dosing routine without daily treatment. It fits people who use floating feeders, built-in automatic chlorinators or skimmers and prefer stabilized chlorine that helps protect residuals from sunlight.

It is less suitable for pool owners who require unstabilized chlorine (for example, for shock treatments) or those who want a non-chlorine sanitizer; likewise, if precise tablet integrity matters for a specific metering device, buyers should note that some tablets may arrive cracked from shipping.

Pros & Cons

Pros

• High concentration provides effective, long lasting sanitation with fewer additions.
• Slow dissolving tablets make weekly dosing practical and convenient.
• Individually wrapped tabs simplify handling and storage while reducing clumping inside the bucket.
• Large 50 lb supply offers strong value for season-long maintenance.

Cons

• Some customers report cracked or broken tablets after shipping, which can speed dissolution in some devices.
• Contains cyanuric acid, so not appropriate where unstabilized chlorine is required.

Specifications

Active ingredient	99% Trichloro-S-Triazinetrione
Available chlorine	90% stabilized chlorine
Tablet size	3in diameter
Packaging	50 lb bucket (may ship as 2 x 25 lb buckets)
Form	Individually wrapped slow dissolving tablets
Intended use	Floating feeders, skimmers, automatic chlorinators

Our Verdict

The C3... 3in stabilized chlorine tablets are a practical, cost-effective choice for most above ground and inground pool owners who want reliable weekly chlorination and clearer water with minimal effort. While occasional tablet breakage in transit can affect dissolution rate, the high chlorine concentration, individual wrapping and large bucket supply make this a good value for routine maintenance.

Frequently Asked Questions

How often should I add a tablet?
One 3in tablet treats about 10000 gallons for up to a week, so most pools require weekly dosing depending on pool size and use.

Can I use these in automatic chlorinators?
Yes, the tablets are designed for floating feeders, skimmers and most automatic chlorinators, though cracked tablets may dissolve faster in some meters.

Do these tablets contain a stabilizer?
Yes, they contain cyanuric acid which helps protect available chlorine from breakdown by sunlight.