When it comes to the variety of DrTim’s Aquatics products, some can be used together but sometimes they should not be mixed. I am going to sort this out in a quick fashion for you. One & Only Live Nitrifying Bacteria — before adding One & Only Live Nitrifying Bacteria, the water must be free …


Yes, there really is a Dr. Tim. It all started with 2 goldfish won at a school fair at age 6 that didn’t survive their first night in his care. DrTim’s gotten better at fish keeping since then! Read Our Story.