C.P. Cleans Potties Bio-Enzymatic Bowl Cleaner - 32oz BottleIt’s the first bowl cleaner to combine a specialized strain of bacteria with 100% biodegradable cleaning agents specifically designed to make the bowl shine like never before and keep the entire system odor-free, while maintaining the bioactive environment essential to odor control in your holding tank. Many marine toilets are sensitive to the chemical used in many cleaning products. The sensitivity to chemicals creates the need to constantly replace rubber parts. C.P. will not harm any part of the toilet system. The results when using this product are like no other! It not only cleans stains it also helps to eliminate odors and keeps your head area smelling fresh!Just squirt a little C.P. under the rim of the toilet bowl. Stains, soil, and odor – even the worst raw water odors from the intake line - just disappear, usually without brushing. C.P. eliminates the need to use bleach and other toxic chemicals to sanitize your toilet bowl. Use C.P. to clean sinks, showers and basins too! It leaves them sparkling clean and fresh-smelling. Putting a small amount in sinks or showers prior to leaving the boat will help to reduce the foul odors that greet you when returning. C.P. Is The Only Bowl Cleaner That Can Be Combined With K.O. (Kills Odors)The combination of K.O. and C.P. make for a truly odor free sanitation system. Many people choose to use K.O. in the holding tank because it is such an effective product and then make the mistake of cleaning with chemicals. Unfortunately, those chemicals kill the bacteria in the K.O. rendering it ineffective. For the best and most effective odor free sanitation system K.O. and C.P. are a must!