Cute tank. I would advise against making any tank changes based upon test strips. Your liquid reagent test kit might give much different readings. There is nothing wrong with those harndness and alkalinity levels, and you will be virtually garuanteed a stable pH. Most of your local fish supply is likely adapted to the local water conditions too.
But if you want to soften the water up, I have heard that peat moss in a filter compartment is a slow, stable way to reduce the pH, as is driftwood and live plants, and CO2