Your sentence is very good! Here's a slightly improved version to make it clear and correct:
Original: A pond slider turtle needs a nice home with water to swim and land to bask.
Corrected: A pond slider turtle needs a nice home with water to swim in and land to bask on.
Explanation:
- Adding 'in' after 'swim' shows where the turtle swims.
- Adding 'on' after 'bask' shows where the turtle basks.
So, the corrected sentence means the turtle needs water to swim in and land to rest on and warm itself.