Hasa algi-control concentrate requires no special equipment for treating swimming pool water. This product is concentrated, the correct use dilution may be added directly to the pool in any spot or added to the water circulation equipment. This product works the best when added by itself directly to pool water. Hasa algi-control concentrate is compatible with most chemicals normally used in swimming pool maintenance; however, in its concentrated form, this chemical should not come in contact with high concentrations of chlorine or any other oxidizer.