pH on Discus system sits at between 6.5-6.8. We try to keep it as close to neutral as possible as a lot of people just keep their discus in comunity tanks and don't mess much with their pH.

I would suggest doing a 30% water change on your discus tank on Mon/Tues and the pH out of tap should bump your tank pH up to about 6.5-6.8.

kev