My tub plunging efforts finally paid off! After many attempts on several different occasions I finally conquered (at least for now) the tub drain in our bathroom. It drains! After plunging it today I pulled out some white gunk, black gunk and hair (mine I'm sure). It was really gross but I was determined not to used any toxic chemicals to unplug the drain. The black gunk is stuff called biofilm (Google it) and I'm not so sure about the white stuff. Maybe soap residue. Who knows but the yuckyness is gone for now!