I want to install a shower in my basement. There was a square hole with rough cement in it. I busted out the cement looking for a drain. There was nothing but dirt in the hole. What do I do for a drain? There is a drain for a toilet and sink.

I'm having an interesting problem with my toilet continuing to run after the tank is full. I have a Fluidmaster fixture inside the tank, and there is a small rubber hose on top of the overflow pipe that shoots water back into the pipe when it's flushed. The problem is that it continues to run after the tank is full, and the toilet will automatically flush itself every 15 minutes or so, even if i'm not there. I can pull the hose out of the pipe, and the water will stop. I can even make a upward kink in the hose, and that will stop it, but when I do that, the hose is so close to the lip of the bracket that holds it that, unless I'm standing there holding it, it will slip out of the bracket and shoot water everywhere. Any help would be appreciated.