MicroBacter Start XLM ? Professional Strength Nitrifying Bacteria for Marine Reef Aquariums Description MicroBacter Start XLM is a powerful live nitrifying bioculture designed to rapidly cycle new marine, reef, and brackish aquariums within 5-7 days. Unlike other live tank starters, it does not require refrigeration, making it highly convenient for aquarists. This professional-strength formula prevents "New Tank Syndrome" and quickly restores biological filtration in overcrowded tanks, after bacterial bed disruptions, or when introducing new fish. It is also useful for reestablishing nitrifying bacteria after cleaning, medication use, or major aquarium maintenance by rapidly reducing ammonia and nitrite levels. Made in the USA, MicroBacter Start XLM is an essential solution for creating a stable, thriving marine environment. Key Features ? Rapidly Cycles New Marine Reef Aquariums ? Fully cycles tanks in 5-7 days. ? No Refrigeration Required ? Unlike other live tank starters, it is easy to store. ? Prevents "New Tank Syndrome" ? Ensures a safe and stable environment from the start. ? Supports Recovery After Tank Disruptions ? Ideal for overcrowding, bacterial bed damage, or new fish additions. ? Reestablishes Bacteria After Cleaning Medication Use ? Quickly restores biological filtration and reduces ammonia and nitrite levels. ? Made in the USA ? High-quality, research-based marine aquarium care. Available Sizes 125 ml / 4 fl. oz. 250 ml / 8.5 fl. oz. 500 ml / 17 fl. oz. 1 L / 33.8 fl. oz. 2 L / 67.6 fl. oz. 4 L / 1 gallon 20 L / 5.3 gallons 210 L / 55 gallons MicroBacter Start XLM is the ultimate solution for rapidly cycling marine and reef aquariums, ensuring a thriving and biologically balanced environment! ??