All of those chemicals are carbonates and are used to raise pH, not lower it. Adding chemicals such as vinegar may do it, but are only a short term solution that takes great care in applying or it causes more problems than it solves.
Driftwood, peat moss pellets or almond leaves (Catappa) will do the job nicely. I have even heard of one person using maple or oak leaves, but I would be leery of that since there can be unwanted chemicals on leaves. These natural items are a better solution since they help maintain or buffer the pH at a lower level and work continuously to keep it there.
Peat moss pellets can be bought in many LFS and added to your filter or placed in a bag of women's hose where water can run through it. Catappa leaves may be used the same way.
Driftwood looks nice, but must be properly prepared before adding it to a tank.
