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Specially Formulated For Rapid Ammonia & Nitrite Reduction

Decreases Ammonia & Nitrite Toxicity




Contains: Nitrosomonas, Nitrospira and Nitrobactor

MICROBEACT/HC (Nite-Out II) is designed specifically for aquarium waters that contain marine life. Its highly-specialized microbial consortium of nitrifying cultures are specially formulated to eliminate ammonia via a natural biological process termed nitrification. The cultures contain in MICROBEACT/HC (Nite-Out II) will establish, promote or stabilize and maintain nitrification in aquarium waters, eliminating the toxic effect of ammonia. MICROBEACT/HC (Nite-Out II) liquid nitrifying bacteria contains select strains of Nitrosomonas, Nitrospira and Nitrobacter. Nitrosomonas oxidize ammonia to nitrite and Nitrobacter and Nitrospira oxidize nitrite to nitrate.

MICROBEACT/HC (Nite-Out II) comprises select microorganisms that are autotrophic – able to use carbon dioxide as the sole source of carbon – and are relatively slow growing, requiring specific conditions for optimum growth with typical cell divisions rates from 8 to 16 hours. Their performance and rate growth is impacted by the environmental parameters required for nitrification.


Available Sizes

  • 1 fl. oz. (30 mL.) (NITEH01) Treats up to 59 gal. (233 L.)

  • 4 fl. oz. (118 mL.) (NITEH04) Treats up to 236 gal. (893 L.)

  • 8 fl. oz. (236 mL.) (NITEH08) Treats up to 480 gal. (1,814 L.)

  • 16 fl. oz. (473 mL.) (NITEH16) Treats up to 950 gal. (3,596 L.)

  • 1 gal. (3.785 L.) (NITEHG1) Treats up to 7,600 gal. (28,769 L.)



  • Keep out of reach of children

  • Wash hands after use

  • If eye irritation occurs, flush with water for 15 minutes

  • Do not take internally

  • Nite Out II need to be kept at or below 72F and can be refrigerated to achieve the best shelf life.

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