Report "My shower drain was running slow during a shower, and when i stepped out i realized that the toilet was leaking from the bottom -screw under cap on left side. i am at a loss and do not even know where to start. i put a bottle of draino in each hole and the shower water went down fine, the toilet water is going down but very slow and when i plunge it poors from the bottom. the clog does not seem to be in the toilet but somewhere past.. in the floor, in a main drain..? what would eat whatever is down there? where could the problem be? should water be able to come up from underneath?"