EverPro Elite Series portion-control non-formaldehyde deodorizing tablets from J & J Chemical provide a long-lasting deep blue color and increased fragrance in each tablet and extreme odor-control technology for demanding conditions. They are available in a variety of exclusive fragrances, with strengths ranging from daily service to weekly protection. Drop one individually wrapped tablet into 5 gallons of freshwater and get instant effervescent deodorizing protection that is nonstaining, fast-dissolving and biodegradable. 800/345-3303; www.jjchem.com.