Thetford Aqua-Kem Holding Tank Deodorant - Powder and Toss-Ins Aqua-Kem Toss Ins are the ultimate in convenience! Simply toss em in to the tank. These water-soluble packets dissolve fast to deliver great deodorizing power and cleaning action. Aqua-Kem is the 1 selling holding tank deodorant of all time because it does the job better than any other marine product Powerful odor control Liquefies waste and breaks down tissue fast to prevent clogging Powerful detergents clean tank walls and drain li