ELI5: Explain Like I'm 5

Hydroponic dosers

Hydroponic dosers are machines that help with growing plants in water instead of soil. They are used in hydroponic gardens, which are special gardens that use water and special nutrients to help plants grow. The hydroponic doser measures out the exact amounts of nutrients the plants need, and puts them into the water every day. That way, plants always get the food they need to grow and stay healthy.