Brazilian red-eared turtles are not deep-water turtles. Although they belong to aquatic turtles, water turtles are also divided into shallow-water turtles and deep-water turtles. Their water and swimming ability are weaker than those of deep-water turtles, so they are not deep-water turtles. In particular, Brazilian red-eared turtles in their infancy must live in shallow water, otherwise they may choke and drown.

How high the water level of Brazilian red-eared turtles is best determined according to their body shape. Generally speaking, the water level of Brazilian tortoises in childhood is lower, because they are small in size, newborn and poor in physical strength. If they are raised in deep water, they may choke and drown. Therefore, the water level of Brazilian tortoises in childhood needs to be controlled below the carapace, so as to avoid drowning.

As Brazilian tortoises grow in size, so does the water level at which they are raised. In developing Brazilian tortoises, the water level can be 1-2 cm higher than the carapace. In this way, not only can the carapace be better developed, but also the situation of choking water due to lack of physical strength can be avoided.

When they are adults, the water level can be controlled at 1-2 times the height of their carapace. Because Brazilian tortoises become stronger and bigger as adults, breeders can raise the water level.