How to minimize the need to adjust pH?

i am using canna aqua nutrients and also some rhizotonic and a little bit of "Dark Energy". i was wondering how i can minimize the need to adjust the pH.

thanks

Well this may not help but I get my H2O from a machine across the street, and I know it's PH is 7.2, after adding my nuets, my ph is changed by the neuts to 6.3- 6.8, and since I grow in soil thats pretty damb good!

If in hydro you'd need a very large reservoir, if in organic soil you don't need to adjust pH.