Tanganyika kH Buffer
 
Phosphate free.  Tanganyika kH Buffer helps emulate the water from Lake Tanganyika in Africa by raising carbonate hardness, locking up pH at 8.5 to 9.5 and stopping pH fluctuation to create pH stability, and reducing stress on your fish.  It also contains minerals to assist with fish fertility and egg production.
Directions:
 
Add heaped 1 teaspoon (8g) to 20 litres of water to raise carbonate hardness by approximately 16dkH (285ppm)