Your aquarium should be optimally treated. Unfortunately, tap water can only rarely be used immediately as aquarium water for a nano aquarium. It usually contains substances that are harmful to invertebrates such as shrimps and plants in the aquarium (e.g. chlorine or copper). These substances are removed by water treatment products.
Nano care
Water care products from various manufacturers tailored to small nano aquariums. Due to the particularly small size of the nano aquarium, optimum water is very important as a vital element for fish and plants.