Walt Smith Fiji Mud Refugium BoosterFiji Mud is unique in its ability to release essential minerals and vital nutrients that will allow hard and soft corals to flourish whether you are starting a new refugium or topping up your existing one. This product contains all the major and minor trace elements as they naturally occur as well as an elaborate network of 5-100 micron size organisms that are critical for the success with Acropora and other small polyp stony corals. It is collected from rare mud patches, discovered by science years ago, which are found in clear uncontaminated seawater. These patches typically occur at 40 - 50 feet of cool, clear water just off the coral reef. The mud is 100% natural product harvested and packed in the Fiji Islands. The starter bucket is ideal for just beginning and the booster jar is ideal to replenish naturally dissipated mud.