We use Fiji Mud in our refugiums here at Vivid Aquariums, and we love it!
Fiji Mud 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.
Fiji 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.
Alternate use: this product can also be added directly to your aquarium at the rate of one teaspoon per 100 gallons twice weekly. Mix with tank water and pour directly into water flow, the water will become cloudy but will return crystal clear overnight. This will add the essentials nutrients when no refugium is available.
Fiji Mud comes in the following two sizes for your maximum convenience:
Refugium Starter comes in a 12lb bucket and is ideal for aquarists who are starting a new refugium system or have a large system and need to buy in bulk.
Refugium Booster is the same product as Refugium Starter but comes in a smaller container of 24 ounces. This size is perfect for those that want to add live mud to their original live sand bed for increased results or to boost their refugium with additional mud as the refugium will naturally deplete over time.