Where can I buy PH tester here in mandaue cebu city philippines?

You may want to try looking for it at Bizeen. It's a website with a list of products, companies and suppliers in the Philippines. Just type the product you need in their search box and do an advance search for your particular location. You can also make your own business website profile there if you want. a href="http://www.bizeen.com" rel="nofollow"http://www.bizeen.com/a