10Kg Oyster Shells

£36.00

Oyster shells can stabilize the pH of a pond by raising the KH of the water.

They will very slowly dissolve when the pH is lower than about 8.2.

You can not over dose your pond on shells. They will not dissolve when the water becomes and Alkaline.

We recommend the use of shells in all ponds. 1 bag per 2,000 gallons should be regarded as a minimum.

It is always better to be prepared and not wait until there is a problem. Do not under estimate how damaging low pH can be.

If you visit the store with a sample of pond water we will gladly test your pH and KH for free. 

Check out the YouTube video I made for more information about low pH.

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