I probably should clear up my first post a bit.
Premium branded aquarium specific substrates may have some value when used to address water quality. My post reflects the fact that I keep over 100 tanks....... Therefore, the use of premium substrates at their MUCH higher price would be unbelieveably expensive for me. My water comes from a well, and is not in need of a buffer nor pH adjustment for the fish that I keep. That is why I am using the cheaper alternative. If you have a need to "adjust" your water, then by all means, use whatever means are necessary. Remember that stability of quality water conditions in your tank is more important than trying to replicate the composition of the water in the wild. Find what works for you, and try to keep it as simple as possible.
Just my 2 cents worth !
Thanks, Jim