4-6mm Oyster shell 5kg sold in a bag

    Delivery time:3-5 Days
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  • Description

Stabilise your ph the natural way.

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.