An easy cleaning solution! These keg & carboy cleaning tablets are a premeasured mixture of alkaline and oxygen cleaners that can break up organic materials that result from brewing activities. They are safe for glass, plastic and stainless steel, the three major materials used in brewing. Simply add the tablets to hot water and allow to sit for at least 60 minutes, then rinse and sanitize. Done! They are used at a rate of 1 tablet per 3 gallons of hot water for kegs, or 2 tablets per 3 gallons of hot water for carboys. If carboys are extra dirty or have stubborn buildup, an extra tablet is recommended. Each container includes 30 tablets. Use these to make brewery cleaning a snap!