Blue Shark Colony Rapid Cycle 473ml

Blue Shark Colony Rapid Cycle uses real, cultured nitrifying bacteria to jump‑start or restore biological filtration in marine aquariums. It introduces beneficial aerobic bacteria — strains such as Nitrococcus and Nitrosococcus — that convert toxic ammonia and nitrite to less harmful nitrate, establishing effective bio‑filtration in days instead of the typical 6–8 weeks.

Ideal for brand‑new aquariums, after major water changes or filter/media swaps, or when adding new livestock. Simply dose according to instructions (adjusted for tank volume), turn off skimmers/UV/ozone while bacteria become established, and monitor ammonia/nitrite closely.