We used premixed water, figured it was safe for just starting out. I believe we are aiming to be between 8.2-8.4 (per the test kit instructions and other sources), looking to start with some clowns, and possibly add coral down the lineAre you using rodi water, store brought/ready mixed or tap water, people have successfully managed aquariums with all, just curious for what your ideal PH would be, also what your looking into stocking with