Well I did a little bit of reading for ya.

It looks like GO is similar to Earth Juice where you shouldn't adjust the PH. There is a big discussion about it on the link below. Some users are saying use regular tap water with it (very similar to EJ).

I figured you might have been using some sort of organic. Other then that I would call them and ask:

If I should ph your water?
If I should bubble your water?
Should I use tap water?
Just say your growing tomatoes and if they fail to answer any questions then I would drop them.

Always Faithful
-319

General Organics Talk
319 Reviewed by 319 on . I need insight with PH levels So,I have been keeping a PH level of 6.7 and have had major problems.I took it down to 6.2 on PH level and little change. I'm in pro mix and I would just like to know what a solid PH level is for soil AND pro mix along with your reason. I think I'm over looking things and need to find a PH I can work with and put a end to this madness. Rating: 5