Oyster Shells 5kg
Premium Quality Oyster Shell Halves
As Used By All The Best Koi Breeders In Japan
These are the best quality Large Oyster Shell Halves available, each Oyster shell is of a premium quality and full size.Oyster shell Halves are used to buffer and maintain a constant pH in your Koi pond.
Ideally used within a submerged media filter or shower filter