Kordon"s NovAqua is the original fresh and saltwater conditioner product developed scientifically over 30 years ago, based on original research on the needs for detoxifying tap water to be used in aquariums and ponds for fish, aquatic animals, and aquatic plant keeping, It also provides skin protection to fishes, This product is now superceded by the newly developed Kordon NovAqua+ , which is reformulated and advanced beyond what the original NovAqua provides, Due to the loyal following the original NovAqua has in users, who are satisfied with what it provides, this product is still supplied, See the description of NovAqua+ for comparisons between NovAqua and NovAqua+, SKU: RPS13649