A CYA of 60 will work just fine, but you won't want to use any trichlor pucks or dichlor shock in this pool as they will both add more CYA. Just use bleach. You'll need to keep your chlorine between 5-10ppm all the time. If you dip below 5, you risk an algae bloom. Test each evening and then add enough bleach to get back to 10ppm. In a 2000 gallon pool, a cup of 6% bleach will add just under 2ppm of chlorine. Use this as a reference to decide how much bleach to add each evening. For the first week or two, test every evening and you'll soon learn how your pool is gonna behave. You many find out that you can add bleach every 2 or 3 days without it falling below 5ppm. Time will tell but to start with, test cl and pH every evening.