Brightwell Aquatics products are formulated by a published marine scientist who has been a passionate aquarium hobbyist for over 25 years. With few exceptions, the raw materials used in Brightwell Aquatics products are over 99.9% pure. All water used in Brightwell Aquatics products is filtered through a multi-stage, high-removal rate purification system. With the exception of trace elements, none of the Brightwell Aquatics products use chelated raw materials. All Brightwell Aquatics products are lot numbered for quality control and customer service.