Check the listing for details. 500 mL Microbacter7 - Bacteria & Water Conditioner Fish Tank Aquarium. Condition: New, Made in USA. Listed at 30.90 USD. Establishes biological filtration in new aquarium set-upsReduces nitrogen, nitrates, nitrites, phosphates, ammonia & organic carbon in all marine and freshwater aquariums with extremely effective microbes and enzymesVeterinarian Pathologist tested and recommendedMade in the USA Brightwell Aquatics MicroBacter7 is a world renowned water conditioner that has a wide range of benefits for any beginner or expert hobbyist looking to start a new aquarium set-up. MicroBacter7 helps rapidly reduce levels of organic carbon, ammonia, nitrite, nitrate & phosphate. It also provides a healthier aquarium substrate, encourages growth of photosynthetic organisms, reduces hydrogen sulfide production, increases dissolved oxygen concentration, and improves water clarity. The concentration of dissolved and particulate organic materials in any aquarium can have a significant impact on the overall appearance and health of organisms residing in that aquarium. Using Brightwell Aquatics MicroBacter7 helps greatly improve water quality leading to healthier aquarium inhabitants for all marine and freshwater aquariums. Brightwell Aquatics MicroBacter7 does not require refrigeration, but refrigeration will maximize the shelf-life of the product.