TJ gets an A,...Dan gets a B-
Not only is bleach damaging to the toilet, but you don't want it in the holding tank either...and it's as destructive to hoses as it is to the rubber parts in toilets and other pumps. In fact, bleach has no place ANYwhere on a boat except in the annual recommissioning of the fresh water system. Bleach is not a cleaner...if it were, it could be used by itself in the laundry...you wouldn't need detergent. Bleach IS a disinfectant, but only in high concentration, and is also highly corrosive. What's more, any "disinfecting" properties in chlorine evaporate within 24 hours, leaving only its corrosive properties behind. Besides, the last thing you want to in a holding tank is "disinfect" it with bleach or any other chemical product. YOu have to put a quart of it down with every flush to accomplish anything anyway...but that's the wrong approach... You want to work WITH nature, not against it...and bacteria are essential in nature. TJ briefly explained why. Pump out your tank, then flush it out VERY thoroughly with nothing but clean water. Make sure your vent line is completely clear. Then use either Raritan K.O. or a Norwegian import called Odorlos in your tank according to directions...and Raritan C.P. to keep your bowl shining and odor free. I suggest you also check out the link below.