Here is the second part to the video set on using botanicals to infuse tannins into an aquarium. Tannins are an important part of a soft water, black water aquarium. Fish from these habitat really thrive in tannin-rich water. They are more active and their colors are vibrant. The botanicals that I feature in this video series came from Tannin Aquatics . I am very happy with the products Tannin Aquatics sent me.