So my bathtub won't drain now. It happened all of a sudden, sometime last night. I'm worried the drain is frozen, but all the other fixtures work fine. What's the best way to free a frozen drain, if it's frozen? I might run out and pick up some drain-o or those plugs that blast air. Although I'm afraid that if it's ice it'll do damage... This weekend is not starting out well. The park pump went again last night, and I was without water. Now this.