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DuoBoost is the optimal support for pond biology in two phases. Phase 1 of the self-dissolving additive contains highly active enzyme and bacterial gel that promotes the breakdown of organic dirt, ammonium and nitrite. In phase 2, a self-dissolving ball supplies the pond with important trace elements, co-substrates, minerals and valuable additives the basis for clear, healthy pond water. DuoBoost can be used several times a year, improves the water quality enormously and effectively reduces sludge.