Why do hydroponic flowers need frequent water changes? Detailed explanation of the reasons

Hydroponic flowers are a cultivation method that many gardening enthusiasts greatly enjoy; not only is it clean, but the cultivation process is also very simple. Although the cultivation process is relatively simple, hydroponic flowers still need frequent water changes, and the editor will now explain the reasons.
Hydroponic plants
First, the conditions for plant growth are mainly water, nutrients and air. The water and nutrients in hydroponic flowers are absolutely sufficient to meet their needs, but the oxygen content in the water will slowly decrease as the flowers grow. When it decreases to a certain level, it will affect the growth of the flowers, so the water must be changed to replenish oxygen.
Second, the roots of hydroponic flowers growing in water, on the one hand, absorb nutrients from the water, and on the other hand, release some organic matter into the water, as well as waste or toxins, which deposit in the water. During soil cultivation, these organic matter mainly dissolve nutrients in the soil that are not easily absorbed by the root system, while waste and toxins are distributed in the soil spaces or flow out through the drainage holes at the bottom of the pot, and will not be absorbed by the root system to affect the normal growth of the flowers. When flowers are grown hydroponically, these organic matter, waste or toxins all deposit in the water and are very easily absorbed again by the plants; this repeated cycle is not conducive to the growth of the flowers.
Third, hydroponic flowers often use nutrient fertilizers. Apart from a portion of the nutrients being absorbed by the root system, the rest remains in the water. When the residual substances reach a certain amount, they will harm the growth of the flowers.
Fourth, the roots of hydroponic flowers produce a kind of mucus. When there is a lot of mucus, it not only affects the absorption of nutrients by the flower roots, but also pollutes the water.