Water flea

This microscopic animal that cleans the water in biological pools, captured in the photo above, is a water flea, or rather, a cladoceran, a species of small freshwater crustacean.

As the image demonstrates, its digestive system is full due to the bioactivity of this animal. This happens because the water flea feeds on microalgae and bacteria, filtering the water in this form and preventing from making it cloudy or otherwise contaminated by these organism .

A single crustacean would not be enough to keep the water clean, as they are less than a millimeter in size. However, what causes biofiltration and makes the water clear is the presence of thousands of these living beings in the water. More than half a million of these microscopic beings can be found in just one cubic meter, tirelessly cleaning the water in a biological pool.

Therefore, in a biological pool, clear water does not mean that the water is sterile. Quite the contrary, it means that the water is full of life, in a dynamic ecological balance!