5 inches! The water depth should be about the shell length.
no
They should have access to a source of water as well as a place to get out of the water at all times.
no,slider turtles have fixed tongues but no saliva for that reason they must eat inside water
red eared turtles live in both ,water and land
It won't harm the turtle - but the eggs should be removed from the water as soon as possible.
No, they drink the water that they are swimming/living in.
Cheek it water it needs to be warm.
yes, it does.
Use a thermometer ! You, as a keeper, should know the temperature ranges suitable for a RES.
Red-eared slider turtle eggs are typically laid in sandy or loose soil near bodies of water, such as ponds or lakes. The preferred nesting environment for red-eared slider turtles is a sunny area with easy access to water, where the eggs can be buried and incubated in warm, moist conditions.
A lot of water; 10 gallons of water per 1 inch of shell. So if the turtle is 8" long it should have at least 80 gallons of water.
Red-eared slider turtles typically lay their eggs on land, not in the water. They will find a suitable nesting site on land to lay their eggs, usually digging a hole and burying them there. If you suspect your turtle has laid eggs, you should look for signs of digging or a disturbed area in the enclosure.