4-6mm Pure Oyster shell 8kg in bucket with free media bag
Stabilise your ph the natural way. 8kg complete with 1 x media bag and a re-usable bucket.
Oyster shell is a natural way of boosting your ponds calcium levels. This stabilises your ponds ph. It simply dissolves when needed and replenishes the waters calcium hardness. 3kg placed in a media bag or basket in your filter will suffice around 1000 gallons for about a year. Safe with all fishes plants and chemicals. We have used this method in our retail shop for over 15 years.