The pH of water straight out of my tap is 7.6. The fish I intend to get have a recommended pH of between 6.0 and 7.0. I will be using liquid CO2 and putting in driftwood once my tank gets here (a 12 gallon Mr. Aqua), which I've been informed will lower the pH of my tank water a bit. Do you think it will drop enough to accommodate my dwarf rasboras?