Alkaline Buffer is a non-phosphate buffer to raise pH and buffer with Acid Buffer. These buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Alkaline Buffer raises pH and buffers between 7.2 and 8.5. It is gentle safe and enhances the freshwater environment. Contains sodium potassium magnesium and other bicarbonate salts. DIRECTIONS: Use 1 level measure (enclosed) to every 4 L (1 gallon) daily until desired pH is reached (this dose will raise alkalinity by about 0.5 meq/L (1.4 dKH). If water is soft or not well buffered use with Acid Buffer (see below). HINTS: Alkaline Buffer will not lower pH. It may be added directly to the aquarium at any time. It preferentially buffers at pH 7.8 but can manage any pH between 7.2 and 8.5 when used with Acid Buffer. If using with RO or DI water for a water change then use with Acid Buffer at a fixed ratio (see chart) to set the desired pH. Once pH is set add water change water to aquarium as soon as possible to avoid pH fluctuations (for best results base ratio on weight): (AcidBuf: AcidBuf-pH) (1: 0.5-5.0)(1: 1.0-6.0) (1: 1.3-6.5) (1: 2.0-7.0) (1: 2.5-7.5) (1: 4.0-8.0). 70 g/ 2.5 oz. Treats 2650 L (700 US Gallons).