South American fish and plants like tetras, angelfish, and discus benefit from the calming affect released by compounds in the media and plants grow with stronger roots and stems. Humic and tannic acids stabilize water hardness and the media is resistant to aerobic and anaerobic degradation due to high lignin content. Granular structure provides a large surface area for beneficial bacterial growth. Adjust media volume to achieve natural water coloration, from a light golden color to a intense rich brown color commonly found in the Amazon River.
