IMO it isn't worth messing with the pH unless you realy know what you are doing. Moving the pH requires knowlage at a-level standord as a minimum, for consistant and reliable results
This type of knowlage will need to be obtained throuh research. It took me about 6 weeks to figure out how to move the pH safely. The 50-50 mix won't always work to get the required results, so lowering the pH can also be fiddely, tweaking the mix at waterchange time to ensure the water is right, as the tap water quality may not always be consistant 