I've got a take with a Ph of around 6.4...

The water is about 70% RO water so its pretty soft water in the
tank...its been treated with Prime and has NO ammonia/nitrite...

I just put 6-10 plants in it...Will they make it at a Ph of 6.4? What
about Co2 addition...It appears this will lower the Ph and I dont think
I need it any lower..

Anyone want to educate me here on this...I am shooting for a well
planted tank with
some community fish...Whats a good Ph ? What range?

Thanks