dc_homeplumber said:Fluidmaster now makes an in-tank bleaching system that sends the chemical down the overflow tube of the flush valve directly into the bowl so that the chemical doesn't come in contact with tank components. I've seen it at The Home Depot for about $15.00. I'm not sure how much the replacement bleach cartridges are.
jimbo said:I would disagree with your analysis on 2 points:
1) Bleach certainly has some disinfectant properties on instant contact. Soaking for some period may be better, but .....
2) After the flush takes place the water in the bowl is refilled by the little tube inside the tank, so actually most of the water that sits in the bowl is water that has been treated through that applicator system.