Discus Buffer® helps to replicate the ideal Discus environment (low pH & low GH (General Hardness)). Discus Buffer® will lower pH and keep it lowered. Discus Buffer® also softens water by precipitating calcium and magnesium. Use Discus Trace™ to restore the proper level of trace elements and feed NutriDiet® Discus Flakes for thriving, healthy Discus. Neutral Regulator® and Discus Buffer® can be used in combination to achieve a desired pH when performing water changes or adding top off water. The ratio chart below is designed for RO water where there is generally no buffering capacity. Contains phosphate buffers and conditioning agents. Safe for all freshwater fish acclimated to acid pH.