ideal KH/GH/pH for fishless cycle?

I'm currently fishlessly cycling, and I've seen notes about pH or KH/GH affecting the cycle, but not much in the way of specifics about what constitutes good numbers for these values. What would be the ideal value for these numbers, if there is one? More generally, what are acceptable ranges?

I know the ideal values differ for different species of fish, I'm just wondering about the bacteria for now.

Thanks, that info helps. I do know my pH right now, but I didn't want to post it, because I didn't want people just to say "that's fine" or something like that... I'm more interested in what's ideal. So is there an ideal pH? If not, what range is good?

No fish yet... but what do the bacteria like best? I'll change the water params later for the fish, if I need to. If I understand things correctly, I'll have to do big water changes after the fishless cycle is over anyway, to get rid of the nitrates.

Fishless cycling tries one's patience, so I'd just as soon tweak any parameters that might have a positive impact.

Thanks!!!

Thanks for the info!

Oh, I just found this:

"...the filter bacteria work more efficiently at pH values above 7.5 and if the pH falls to below pH 4 (I think) Bacterial activity stops all together."

-from http://groups.msn.com/Breedingtropicalfish/waterchemistry.msnw

My pH from the tap is actually about 7.5. The water in my tank is a little lower than that, but at least 7.2. I probably won't try to adjust the water, given that I'm reasonably close to the target value. But I thought there were things you could do to adjust the pH if you wanted to...? For example, my pH test kit (from Aquarium Pharmaceuticals) came with bottles of "pH up" and "pH down", for whatever they're worth.