99% Pure Trichloro-S-Triazinetrione 90% Available Stabilized Chlorine With NO Fillers Slow-Dissolving For Longer Lasting Protection Ideal For Use In Floating Feeders & Automatic Chlorine Feeders Packed In 2 Lb. Bags For Safe, Easy Handling Same outstanding formula as our 3" tabs - super slow dissolving for longer lasting protection. Our 1" tablets are perfect for floating feeders and automatic chlorine feeders. Tablets weigh 0.5 oz. each. Packed in 2 lb. bags for easy handling.