Thanks for the advice. I set the dilution % to 100, the water type to RO and the style to pale ale. I've got my water amounts in as well. So now it's just a matter of inputting different minerals/amounts until I land within the desired range, correct? My apologies for all the questions but this is an aspect I've never tinkered with before. I usually buy bottled water or toss some campden tablets in my overly chlorinated tap water :0)
That's about right. I've found Bru'n Water to be very easy to use. My dark beers were much better than my lighter colored beers.... it turns out that my water is moderately alkaline and somewhat variable, so building from RO has helped me improve both quality and consistency. Also, my mash pH when building up from RO is always within 0.1 of what's predicted by Bru'n Water. YMMV.
Edited to add: I really like the Pale Ale profile, but have only used it for a APA and AIPA.