<< How can I lower the pH? >>
It depends on why you want to lower the pH. Most species care more about
dissolved solids than pH. There are a few fish, like wild Angels from Peru that
require both low Total Dissolved Solids (TDS) and a pH below 6.5. Others who
come from soft, acid water really only need the softness -- in reality low
conductivity or TDS. To reduce the pH you must remove any buffering gravel or rocks
and natural hardness in the water. Then the pH will drop, either by itself or
by slight addition of an acid like hydrochloric (dilute), perhaps more than
you want.
Lee Harper
Media, PA
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