The pool is really an inspection issue, and while this CAN be addressed in attorney review to help you avoid paying $$$ for a non working pool, typically these things are addressed and negotiated after AR is concluded and you have performed your home inspection, including having the pool inspected. Speak to your attorney about how he/she wants to handle it.
Also, bear in mind that if the sellers represented the pool was being sold in "as is" condition, either in the listing and/or in a sellers disclosure, you may have no recourse as you were informed about it's condition before you wrote a contract on the house. This does not preclude you from having the pool inspected but typically "as is" means just that. Again, not knowing your specific situation, speak to your attorney to see what rights you may have regarding this issue and what recourse if any you may have.