Blue Shark Colony Rapid Cycle 946ml

Blue Shark Colony Rapid Cycle delivers concentrated, live nitrifying bacteria (strains like Nitrococcus and Nitrosococcus) to quickly establish or restore biological filtration in marine and reef aquariums. It drastically reduces the traditional 6–8 week “cycling” period — enabling safe fish or coral introduction in just a few days.

When used correctly (water temperature ~23–30 °C, pH ~7.9–8.3, adequate alkalinity), a single dose suffices to seed your system’s biological filtration. For best results: shake well, dose the entire system volume, suspend feeding light during the first 24–48 h, and avoid water changes, UV/ozone/ozone‑generation or skimmers that might remove bacteria for 3–5 days.

This size (946 ml) treats up to ~378 L (≈ 100 gal), making it suitable for medium to large aquariums — or for repeat dosing after major water changes, media swaps, or livestock additions.