The Submarine Core Reactor is the Special Building required for researching the Bloontonium Reactor upgrade. It costs
Buildings in the Bloons Monkey City series
Decorations
Path Decor Flowerbed · Small Bush · Tree · Topiary Ball · Ball of Roses · Bed of Roses · Wooden Crate · Tiki Torch · Large Bush · Easter Tree · Cactus Plant · Cherry Blossom Tree · Banner · Wooden Bench · Skull · North Pole Sign · Stone Bench · Fir Tree · Palm Tree · Stone Vase · Iron Bench · Lamp Post · Pickup Truck · Bird Bath · Monkey Topiary · Pond · Fishing Pier · Wooden Bridge · Love Lock · Stone Bridge · Monkey Fountain Fence Buildings Santa's Workshop · Firework Factory · Eiffel Tower · Stadium · Rollercoaster · Saloon · Art Stall · Cotton Candy Stall · Hot Dog Stand · Dumpling Stall · Chestnut Cart · Wild West Wagon · Decorated Tree · Circus Tent · Cafe · Goldmine · Ferris Wheel · Helter Skelter Monkeys
30,000, takes 36 hours to build and gives 700 XP once completed. It consumes 
60. It requires Level 21 to unlock.
