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41X6Tqdddol 1405067742

Walt Smith's Fiji Mud- Refugium Starter (6lb bucket)


Walt Smith's Fiji Mud feeds your reef aquarium the essential minerals and nutrients. Natural ocean mud from the islands of Fiji in the South...

Walt Smith's Fiji Mud feeds your reef aquarium the essential minerals and nutrients. Natural ocean mud from the islands of Fiji in the South Pacific feeds and nourishes your hard or soft corals. It is collected from unique mud patches, discovered by science years ago, which are found in clear uncontaminated seawater and contains all naturally-occurring major and minor trace elements. The mud is also rich with a multitude of 5 to 100 micron-sized organisms that benefit Acropora and other small polyp stony (SPS) corals. Three sizes are available: a 6lb. and a 12lb. Refugium Starter bucket, or a 24-ounce Refugium Booster tub to replenish naturally dissipated mud.

Instructions for use:

When first starting your aquarium, use the 190-ounce Refugium Starter bucket and apply 1-2" either directly into your refugium, or fill a number of the plastic trays provided and place these into your aquarium’s sump. Replenish any naturally dissipated mud with the 24-ounce Booster. 

Alternatively, you can add this product directly to your aquarium at the rate of one teaspoon (5 ml) per 80 gallons (360 litres) twice weekly. To use the product this way, it is recommended to first mix the appropriate amount of mud with aquarium water and pour directly into the water flow. The water will become cloudy, but will clear overnight. This will add the essentials nutrients when no refugium is available

Tips on using Walt Smith's Fiji Mud:

  • You should replace between 20-30% of the mud every 4-6 months. The mud will naturally replace some of its own nutrients in the normal cycling and through algae growth.
  • Mud can be easily added to any existing live sand you have. It is NOT recommended to discard any sand you have already established. Instead, either layer 1 inch of mud on top of the existing sand, or mix the sand and mud together.
  • Whenever you place mud in your tank, you should expect the water to cloud for a short period of time. Do not worry if some of the mud settles on your coral- simply create some wave action in front of your corals and the mud should sink and settle down to the bottom.
  • The best way to add mud to your aquarium is to turn your pumps off and let it stand until the mud settles (approximately 30 minutes). Once the mud has settled, restart your pumps.

Storage Instructions:

Store unopened containers in a cool place. Refrigerate after opening and it is best to use within six months of opening.


Please Note: Walt Smith's Fiji Mud Refugium Booster is the same product as Refugium Starter but comes in a smaller container. The Refugium Booster is therefore a great option 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.

Brought to you exclusively by the award winning Maidenhead Aquatics, leading the way in responsible fishkeeping procedures and innovation.

Made from mineral and nutrient-rich natural reef mud, culled from the South Pacific reefs off of Fiji in 40-50 feet of water. It is packed full of naturally occurring major and minor elements and an elaborate network of 5 to 100 micron-sized organisms. 


It contains NO additives, preservatives, pharmaceutical grade minerals, binders, or buffers.


Frequently Asked Questions:

Q) What is the difference between “Refugium Booster” and “Refugium Starter”?
A) There is no difference in the actual product itself. However, “Refugium Starter” is a 190-ounce bucket and is sold in this size for those of you who are starting a new aquarium and need a large amount or for those who simply want to purchase a large amount because of frequent use and the economy of the larger size. On the other hand “Refugium Booster” is sold in a 24 ounce size for those who simply need to top up their existing refugium with additional mud or just need a little extra on hand.


Q) Why is mud so important to my aquarium set up?
A) Mud that is harvested from the ocean in clear water patches will contain all of the essential minerals and trace elements that are found in the sea in their natural state and composition. When your water passes over this concentration of minerals and elements in your refugium it caries with it some of the most important nutrients that you can furnish your system in its natural state.


Q) How long will “Fiji Mud” last in the package?
A) As long as the product remains moist you can be sure that it will still have the active ingredients and minerals required to maintain the integrity of this product. Since this is the only product that is actually harvested on the reef in the South Pacific it is truly unique in its composition and ability to benefit your captive reef system.


Q) How often will I need to add more mud to my refugium?
A) Some of the mud will naturally dissipate into the water column as the water flows over it. The change will be gradual and every tank or refugium will be different depending on flow. In general, it is a good idea to watch the level of mud and when you see it start to go down just add a little more. The standard height of mud in your refugium should be about 1 ½ - 3 inches (this would also depend if  you’re trying to grow algae and plants in the refugium).


Q) Do I need to replace any of the mud because the nutrients are used up?

A) The mud will naturally replace some of its own nutrients in the normal cycling and growth of the algae. However, it is recommended that every 4 – 6 months you do replace about 20% - 30% of the mud for a more vibrant and robust bed of fresh minerals and trace elements.


Q) If I do not have a refugium can the mud still benefit me?
A) If no refugium is currently being used in your system then the mud can still be used to benefit you reef with the essential (and all natural) minerals. This can be accomplished by simply adding some of the mud into your substrate on a regular basis. The formula for this method is listed on the jar and also at the end of this information card.


Q) I already have live sand in my refugium- can the mud still be added or do I need to discard the sand?

A) There is no need to discard the sand and we do not recommend doing this. The mud can be easily added to the the sand by either putting a layer of about 1 ½ inches on top of the sand or by mixing the sand and mud together. This will greatly benefit all of the advantages that your refugium is designed to provide.


Q) When I place the mud in my aquarium should I expect the water to become cloudy and (if so) will this harm my tank?

A) Whenever you place mud in your tank you should expect the water to cloud up for a short period. If some of the mud settles on your corals do not worry, this happens in the ocean all the time and all you have to do is create some wave action in from of your corals to blow it off. However, the best way to add the mud is to turn your pumps off when mixing the mud in and let it stand until the mud settles in the aquarium (usually 30 minutes) then restart your pumps for best results. 

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