Starter bacteria aquarium 5000 ml – safe start for large aquariums – stabilises water after cleaning & water changes – reduces ammonia & nitrite biologically – ARKA Nite-Out II

• Safe biological start: Designed for large aquariums and ponds – supports quick and stable biological cycling – safe for fish and plants.
• Effective ammonia control: Reduces ammonia and nitrite through natural bacterial processes – protects sensitive species.
• Long-term stability: Maintains clear, balanced water in larger systems – ideal after maintenance or filter cleaning.
• Easy use: Add directly to the water – 10 ml per 100 l – compatible with all ARKA water care products.
• ARKA quality: Premium biotechnology for safe and natural water balance – trusted by professionals.

Product Description Nite-Out II is a specially developed bacterial blend of purely biological ingredients that accelerates and perfects the establishment and upkeep of marine and freshwater aquariums. It ensures optimally functioning nitrification in the aquarium rapidly and lastingly: NH3 ammonia / NH4 ammonium –> NO2 nitrite –> NO3 nitrate. Together with Special Blend, Nite-Out II replaces the “classic” run-in method and ensures that fish can be stocked quickly and safely. It is used at the start of an aquarium and subsequently, typically after major water changes and for new stocking. Directions Follow the safety instructions and instructions for use on the product label.