Products
1 Inch Chlorine Tablets — 20g Rapid-Dissolving Calcium Hypochlorite
1 inch chlorine tablets are the fastest-dissolving solid chlorine format manufactured by Everglory Industrial, engineered specifically for small-volume and rapid-response water treatment scenarios where a quick chlorine boost is essential. Each tablet weighs exactly 20 grams and measures approximately 25mm in diameter, containing 65-70% available chlorine as high-purity calcium hypochlorite. Unlike the larger 3-inch (200g) tablets designed for multi-day slow release, 1 inch chlorine tablets dissolve completely within 30 to 60 minutes in typical water conditions, delivering an immediate chlorine elevation that is ideal for spas, hot tubs, small above-ground pools, and emergency water disinfection. Everglory Industrial exports these 20g tablets in UN 2880 certified plastic drums to B2B distributors, pool service companies, and humanitarian organizations across 60+ countries, with full documentation support in English, French, and Spanish.
1 Inch Chlorine Tablet Specifications
The following table details the physical and chemical specifications of our 1 inch chlorine tablets. All parameters are tested on every production batch and documented in the Certificate of Analysis provided with each shipment:
Why Choose 1 Inch Chlorine Tablets?
The compact 20g format offers distinct operational advantages that make 1 inch chlorine tablets the preferred choice for specific B2B applications:
- Rapid dissolution for quick chlorine boost: The 20g tablet dissolves 50 to 100 times faster than a 200g tablet, delivering available chlorine within minutes rather than days. This rapid release is critical when a pool or spa has low chlorine residuals and requires immediate sanitization to prevent bacterial or algae growth
- Ideal for small water volumes: A single 20g tablet treats approximately 2,000 to 5,000 liters of water, making the dosage precise and economical for small above-ground pools, spas, and hot tubs where a 200g tablet would over-chlorinate and require dilution
- Fits all erosion feeder systems: The 25mm diameter is the industry-standard size for commercial erosion chlorinators and inline tablet feeders. The tablets flow smoothly through feeder chambers without bridging or jamming, ensuring continuous automated dosing
- Precise dosing for spas and hot tubs: Hot tubs and spas require careful chlorine management due to high water temperatures and bather loads. The 20g unit size allows spa service technicians to dose exact quantities without splitting larger tablets, eliminating guesswork and waste
- Cost-effective for small pool service routes: Pool service companies maintaining residential pools on weekly routes use 1 inch chlorine tablets for shock dosing and small pool treatment. The compact size reduces product waste and transportation costs compared to handling only 200g tablets for every service call
Applications of 1 Inch Chlorine Tablets
The rapid dissolution and compact 20g format of 1 inch chlorine tablets makes them suitable for a focused range of applications where fast chlorine delivery and precise dosing are paramount:
- Residential spas and hot tubs: The primary application for 1 inch tablets. Spa owners and service technicians place 1 to 3 tablets in the spa skimmer or floating dispenser to maintain 3 to 5 mg/L free chlorine residual. The 20g size prevents over-chlorination in the small water volume (800 to 2,000 liters) typical of residential spas
- Small above-ground and inflatable pools: Above-ground pools of 5,000 to 15,000 liters benefit from the measured chlorine release of 20g tablets. One to two tablets dissolved in the skimmer or floater maintains an appropriate sanitizer level without the sharp chlorine spikes caused by granular addition
- Erosion feeder systems: Commercial spa facilities, hotel pools, and aquatic therapy centers use inline erosion chlorinators loaded with 1 inch tablets for automated continuous dosing. The tablet geometry ensures consistent feed rates and prevents channeling through the tablet bed
- Emergency water treatment: Humanitarian organizations, military field units, and disaster response teams carry 1 inch chlorine tablets for rapid purification of drinking water. One 20g tablet treats 200 liters of water to achieve 0.2 to 0.5 mg/L free chlorine residual suitable for potable use after 30 minutes contact time
- Surface disinfection: Dissolving 1 inch tablets in water creates a high-strength hypochlorite solution for surface sanitation in food processing facilities, agricultural buildings, and veterinary environments. One 20g tablet in 2 liters of water yields approximately 5,000 to 7,000 mg/L available chlorine
1 Inch Chlorine Tablets Dosing Guide
The following dosing guide provides general recommendations for using 1 inch chlorine tablets across different water volumes. Actual dosage should be adjusted based on water temperature, bather load, and chlorine demand testing:
Always test free chlorine residual 30 minutes after tablet dissolution and adjust dosage accordingly. Maintain 1 to 3 mg/L free chlorine in swimming pools and 3 to 5 mg/L in spas and hot tubs. For emergency drinking water treatment, use 1 tablet per 200 liters and verify residual chlorine with a DPD test kit before consumption.
Packaging and Storage
All 1 inch chlorine tablets are packed exclusively in UN 2880 certified plastic drums with inner PE liners, ensuring full compliance with IMDG code requirements for maritime shipping of Class 5.1 oxidizing substances. Available drum sizes include:
Store 1 inch chlorine tablets in the original sealed plastic drum in a cool, dry, well-ventilated area at temperatures below 30 degrees C. Keep away from direct sunlight, heat sources, acids, ammonia, and combustible organic materials. Do not stack drums more than three layers high. Shelf life is 24 months from the manufacturing date under proper storage conditions. Once opened, reseal the drum tightly after each use to prevent moisture absorption, which accelerates chlorine degradation and can cause tablet softening.
Quality Assurance
Everglory Industrial maintains a comprehensive quality assurance program for all 1 inch chlorine tablets exports. Every order ships with the following documentation and certifications:
- Certificate of Analysis (COA): Each production batch is laboratory-tested for available chlorine content, moisture, tablet hardness, friability, and dissolution time. The COA documents actual test results against specification limits and accompanies every shipment
- Material Safety Data Sheet (MSDS): Provided in English, French, or Spanish per buyer requirement, containing complete hazard identification, handling procedures, first-aid measures, and emergency response information compliant with GHS standards
- UN 2880 certification: All plastic drums are certified under UN 2880 packaging standards for Class 5.1 oxidizing substances, with proper markings, closure testing, and DG labeling for international maritime transport
- ISO 9001 quality system: Our manufacturing facility operates under ISO 9001-certified quality management, with documented procedures for raw material verification, in-process control, finished product testing, and traceability from production to shipment
- Third-party inspection support: We accommodate pre-shipment inspections by SGS, Bureau Veritas, Intertek, or buyer-designated inspection agencies. Sampling, testing, and container loading supervision can be arranged at the buyer's request
Frequently Asked Questions
Q: How long do 1 inch chlorine tablets take to dissolve in warm spa water?
In warm spa water at 35 to 40 degrees C, 1 inch chlorine tablets dissolve in approximately 20 to 35 minutes, faster than the 30 to 60 minute range in standard pool water at 25 degrees C. The elevated water temperature accelerates the dissolution reaction. Spa owners should monitor free chlorine levels closely after dosing, as the rapid release can temporarily elevate chlorine above the target 3 to 5 mg/L range.
Q: Can I use 1 inch chlorine tablets in a saltwater spa?
Yes. 1 inch chlorine tablets are compatible with saltwater spa systems and can be used as a supplementary sanitizer when the salt chlorine generator cannot keep up with bather demand. The calcium hypochlorite in the tablets does not interfere with the salt cell operation. However, monitor calcium hardness levels, as continued use of calcium-based chlorine will gradually increase calcium hardness in the spa water over time.
Q: What is the difference between 1 inch and 3 inch chlorine tablets?
The primary differences are tablet weight, dissolution time, and application. A 1 inch tablet weighs 20g and dissolves in 30 to 60 minutes, making it ideal for spas, small pools, and rapid chlorine boosting. A 3 inch tablet weighs 200g and dissolves over 2 to 7 days, making it ideal for large pool maintenance and continuous dosing. The 1 inch format provides flexibility and precision for smaller water volumes, while the 3 inch format provides sustained release for larger pools.
Q: How many 1 inch chlorine tablets are in a 25 kg drum?
A standard 25 kg export drum contains approximately 1,250 1 inch chlorine tablets at 20g each. The exact count may vary slightly due to tablet weight tolerance of plus or minus 0.5g. A 50 kg drum holds approximately 2,500 tablets. Drum counts for other sizes scale proportionally. Contact us for exact tablet counts per drum configuration.
Q: Are these 1 inch chlorine tablets truly binder-free?
Yes. Our 1 inch chlorine tablets are pressed using mechanical compaction only, with zero chemical binders, fillers, or additives. The tablet form is achieved entirely through applied pressure on pure calcium hypochlorite granular feedstock. This ensures maximum available chlorine content (65-70%) and eliminates any risk of contaminant introduction from binding agents. We can provide a formulation declaration letter upon request.
Q: What is the minimum order quantity for 1 inch chlorine tablets?
Our standard MOQ for 1 inch chlorine tablets is 1 metric ton (50 drums of 20kg or 40 drums of 25kg) for trial orders. For regular orders, we recommend a full 20ft container load of 20 to 27 metric tons depending on drum size selection. OEM private label orders require a minimum of 5 tons. Contact us with your volume and packaging requirements for a detailed quotation.
Need rapid-dissolving 1 inch chlorine tablets for your spa or pool service business? Contact Everglory Industrial today for a free quote with CIF pricing to your destination port. Our export team responds within 24 hours and communicates fluently in English, French, and Spanish. Send your tablet grade, drum size, and volume requirements — we are ready to support your procurement needs.
