Betta Basics is specially designed to provide an optimal environment for both Bettas and plants. Betta Basics eliminates chlorine and chloramine and detoxifies ammonia. It buffers water to a pH of 7.0 and provides a healthy environment for fish and plants. As Bettas are often kept in unfiltered, low-volume s, it is therefore necessary to prevent the appearance of nitrates, nitrites and ammonia. Instructions:Use with every water change. For best results, also use 2 to 3 times a week. Add 1 capful (5 ml) per 1.25 L of water. In Betta(i.e. without plant), use 1 capful per 4 L with water changes.250 ml = 250 L60 ml = 60 L