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Increase and stabilise ph and kh.
-Natural osyter will slowly dissolve and release carbonates and calcium ions into the water.
-It increase and stabilise the PH and KH over 6 months and prevent dangerous ph crash or swing in aquarium/pond.
-The oyster shells are thoroughly wash and further cleaned to remove any leftover organic residues.
-Suitable for canister filters, internal filters, top filters, trickle filters, pond filtration and sump filtration.
-2.5kg bag for 1000-2000L
-0.8kg bag for 300-500L