Waterlife 8.3 BufferWaterlife 8. 3 Buffer will raise and maintain the pH of aquarium water up to 8. 3 by increasing the temporary hardness. 8. 3 Buffer will not increase the pH of aquarium water above 8. 3 if used as directed. Notes: Check pH and dKH levels regularly since naturally occuring acids will erode the buffer over time. Like all Waterlife products, 8. 3 buffer is harmless to nitrifying bacteria.