What is the fine-grained topic of the following text: Aquatica’s Japanese Ofuro soaking tubs with the Tranquility bath heating system are fitted with a heater, recirculation system, ozone disinfection system, chromotherapy and Bluetooth sound system while providing for an extremely comfortable, deep soak with very small footprint. Only return the topic.
Aquatica's Japanese Ofuro soaking tubs with the Tranquility bath heating system