Level 1 of 30:
Item(s): Balloonimal Poop (?k), Limax Poop (?k)
Reward: Sewage Potato

Level 2 of 30:
Item(s): Horus Poop (500k), Basil Poop (9k)
Reward: 250 MP

Level 3 of 30:
Item(s): Inferno Poop (88k), Gargrunt Poop (400k)
Reward: Sewer Cleaner Shirt

Level 3 of 30:
Items: Gargrunt Poop (400k), Mailo Poop (500k)
Reward: 500 MP