Should I change the water pump when replacing the timing belt on 2000 Acura Integra

When should I replace the timing belt and should I replace the water pump at the same time. Please include costs.
Thank you

2 answers
Yes. If you are changing the timing belt you might as well change the water pump and tensioner at the same time. Advance auto sells a kit for about 135.00
When should I replace the timing belt and should I replace the water pump at the same time. Please include costs.
Thank you