Translations:Culture de la spiruline/44/en

With the heat of the pond, the water evaporates but the food, salt and baking soda remain in the pond.

• Add water regularly to return to the initial volume, indicated by a marker 20cm from the bottom.

REMINDER Tap water can be calcareous, it must be softened or use rainwater or osmosis water (see Preparing the culture medium: the living environment)..