Aqua Pics Amazon conditioning crystals brings up the Kh in tanks and has been specifically designed for Discus, L-Number Catfish and Apistogrammas.
Amazon Kh Conditioner
Dose:
Add 1 teaspoon to 8 Litres of Water, this will raise Carbonate Hardness by approximately 6KH or 105ppm and bring PH to around 6.5 to 6.8
$159.00 AUD
$46.95 AUD 
