How deep should the water depth for raising grass turtles be determined according to their body shape and growth stage. Generally speaking, young grass turtles are relatively small in size, and their water quality and swimming ability are not fully developed, so the water level should not be too deep. It is best to control under the carapace, so that they can breathe fresh air when they look up or stand on tiptoe. After 1-2 years of development, their adaptability to the environment will become stronger, and breeders can raise the depth of water level. Control the height of water level to 1-2 cm above the carapace. When they mature, the depth of water level can be raised a little. Because they are adults and mature in size and physical strength, they can be raised at a water level twice as high as their carapace.

There is no requirement for water quality for grass turtles, and tap water, river water, lake water or well water can be used. Tap water is more common and easily available. The water quality is relatively clean, but after chemical sterilization and disinfection, chlorine gas in the water has a certain impact on the health of grass turtles, so breeders need to be exposed to the sun for 2-3 days before using it.

River water and lake water are suitable for grass turtles to live in, because this water is similar to the water from which they originated. However, these two kinds of water are easily polluted, and the water quality is relatively unclean, so breeders need to filter out impurities before using them.