If you are looking at getting a red ear slider turtle you need to learn a few things about them first.
Lets start with the fact that your red ear slider turtle can get as large as 12 inches. The tank needs to be 10 gallons for every 1 inch of turtle. So if your turtle is 4 inches in size you will need a 40 gallon tank. It takes them several years for it to get to complete adult size, so you have a while to adjust the size.
Remember that a red ear slider turtle is going to need a lot of care. They need a good filter to take care of the mess they make. This will help you keep from having to clean the tank so often and keep it free from algae.
If you take proper care of your red ear slider turtle, they can live up to 40 to 50 years or more. You need to have plans in place for what is going to happen to them if something happens to you. Let your family know they cannot let them out in the wild. They will not be able to survive.
One important thing you need to know about your red ear slider turtle, is that they can carry Salmonella. If you have small children or someone who has a weak immune system, you need to research all the risks of having one in your home.
Red ear slider turtle will need both protein and vegetables in their diets. When they are young they need more of the protein, but you want to introduce vegetables early or them may not want them later. You can add some of the pellets as a change and to add the vitamins they need. Live earthworms, mealworms etc are great for them as well.
A red ear slider turtle needs a variety of greens also. Leafy vegetables are a great choice. Carrots and carrot tops are good along with various aquatic plants, but you will need to shred them to make it easy for your young turtle to eat it.
When decorating your tank for your red ear slider turtle add things that will allow him or her the ability to swim in, out and around the vegetation and decorations. They need a platform for them to get out of the water and bask under a light. You need both a UVB light as well as a heat lamp. Place the light where the turtle cannot get harmed by it. The water temp should be between 80 and 82 degrees Fahrenheit, with the basking area 10 degrees higher than the water temp.
When you first get your red ear slider turtle, it may be a bit shy, but once it gets to know that you are the one that brings dinner, they will soon get very excited to see you and not shy away. Our turtle gets so excited just from us walking past his tank that he almost falls over backward and almost knocks his castle over.