Someone told me that the plastic jugs used for cat litter can be reused to store drinking water for emergencies. So I took three empty jugs and rinsed them out in a bathtub before filling them.
Oops. Cat litter + water = hard clumps. My bathtub now drains very slowly.
What can I do, other than snaking? Given that cat urine is presumably acidic, might it help to make the water more alkaline?