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The Water Cleanser is a prebiotic for bacteria involved in healthy nitrate cycles. Please note that
The Water Cleanser blocks in and of itself does not contain these bacteria rather it helps creates an environment where healthy bacteria is able to proliferate and limit the growth of undesirable strains like cyano bacteria.
Spheres 4pk Aquarium, Spheres 16pk Aquarium, Spheres 14pk Pond, Spheres 14pk Pool, Block 1kg, Block 215g Pool