Tropical/Cold Water GH Conditioning Salt 500g
This is special blend made for us consisting of a mix of products to raise general hardness.It has added Iodine and Potassium which is good for plants and fish fertility.1 teaspoon (5g) to 8 litres of water will raise general hardness by approx. 8 GH or 140ppm.(For Goldfish use heaped teaspoon as they like slighty harder water).