If you are keeping fish from a black water river, then add peat. Otherwise I would not bother. pH in the low to mid 7s is usually just fine for soft water fish.
Of the list in your signature I know guppies are hard water fish, they do not need the organic acids that are found in a black water stream.
Not sure about the others. Many Tetras and other SA fish do come from black water streams, but not all. I think Rams do better with black water, but not sure.
Of the list in your signature I know guppies are hard water fish, they do not need the organic acids that are found in a black water stream.
Not sure about the others. Many Tetras and other SA fish do come from black water streams, but not all. I think Rams do better with black water, but not sure.