When treating salt water, it is crucial to choose a suitable reverse osmosis system, especially the standard seawater reverse osmosis system (SWRO) and the brackish water reverse osmosis system (BWRO) have obvious advantages in treating water sources with different salt contents.

The high purity of reverse osmosis water means that it lacks necessary minerals, which is not good for freshwater fish. Freshwater fish rely on minerals in water to maintain physiological functions, such as calcium, which plays an important role in bone development and health.