Robert Lavoie wrote:

Hello,

If the water has a PH of less than 7 how can I correct it?

Try baking soda to increase pH (and also buffer).
http://www.drhelm.com/aquarium/chemistry.html

-D

--
"A positive attitude may not solve all your problems, but it will annoy
enough people to make it worth the effort." -Herm Albright