Ordinary sand is washed and put in a landscape fish tank, and aquatic plants do not grow.

The diameter of sand must be about 0.5 cm.

The requirements for the growth of aquatic plants are illumination (including brightness and color temperature)-carbon dioxide (most aquatic plants need carbon dioxide equipment)-fertilizer (most aquatic plants can use aquatic plant liquid fertilizer). As long as these basic conditions are met, the growth of aquatic plants is relatively easy @