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You are here: Home / Refugium Education / A Beginner’s Guide to Setting up a Refugium
Most often, a beautiful marine aquarium has a strong refugium!

A Beginner’s Guide to Setting up a Refugium

by greg.chernoff

There are many benefits to building or creating a refugium in your saltwater aquarium. It allows for additional surface area for beneficial bacteria to grow, which filters out nitrates and nutrients in an efficient and natural way. They also provide a habitat for small beneficial organisms so they can reproduce without getting eaten. Algae is also commonly grown in a refugium as an additional form of nutrient export. The algae uses the nitrates and phosphates, which come from food and fish waste, to grow. Then, the algae is harvested and the nutrients are successfully taken out. Having a refugium increases the overall biodiversity of your tank, which improves the wellbeing of the aquarium.

[Refugium]

Pre-Planning Topics

  • Where:
    The location of where your refugium is going to be is very important and the first thing you need to decide. The best place for it is in a sump. Having a refugium in a sump is the cheapest and most beginner friendly option. If you do not have a sump there are other methods, but ultimately having a sump will be best. In your sump, you will most likely have two or three sections. The first section is where your intake is and where the protein skimmer is. The second section is where your refugium will be. And the third section is where the return pump that pumps the water back into your tank is located. You may have other kinds of filtration and equipment such as carbon, GFO, reactors, and dosers, but essentially the best place for your refugium is the last section of filtration. This ensure that any copepods or other organisms will not be filtered out before they get put into the tank and it allows your protein skimmer and other filtration to work more efficiently. There are certainly reasons to put the refugium in a different section, but putting it as the last stage is the most methodical place.
  • Budget:
    You must decide what your budget is for your refugium will be. How much are you willing to spend? It is possible to build a refugium with under $100, but there are benefits to spending more. With this in mind, consider what kind of media or substrate you want and also what kind of light you will use. Along with any crustaceans or organisms.
  • What:
    What will you put in the refugium? You can use plain sand which you can buy new or use left over sand. Another option is refugium mud, which is said to be better than regular sand. You could leave it at that or go further and buy rock or use left over rock. MarinePure blocks are perfect media for a refugium. They have a surprising amount of surface area for there size, which makes them a better option then rock. I do not recommend using live rock, as live rock will most likely have harmful pests and is much more expensive.  When it comes to algae, I recommend Chaeto or Chaetomorpha. This is the standard algae for refugiums, which is for a reason; it is easy to care for, grows fast, and is very effective. You can choose a different kind, but for a beginner, Chaeto is the way to go. This algae is not like the algae that you are scrubbing off your rocks or scraping off your glass. It is beneficial and not harmful or annoying. It is called macroalgae, while the pest algae is called microalgae. You will also need some kind of small crustaceans, such as copepods or amphipods. Along with phytoplankton to feed those organisms. AlgaeBarn sells their Ultimate Refugium Starter Pack that has everything you need to start your refugium that was just listed as well as beneficial bacteria for cycling a tank. It is great for beginner refugiums or for anyone starting a new refugium and is cost efficient as well.  Last, you will need a light. There are many options for refugium lights and depending on your standards and budget, it should not be too difficult to find the one for you.

 

After considering and planning the previous topics, you will be ready to set up your new refugium.

  • Step 1: Turn off your return pump and prepare the section where you will have your refugium.
  • Step 2:  Add your substrate and media. If you have chosen to use sand or refugium mud, put that in first and fill to about one to two inches of depth. Then add your rocks, MarinePure blocks, or other media you chose. You may want to rinse out your media before using it if it is new or has been sitting out for a long period of time.
  • Step 3: Put in macroalgae. You can wedge it under a rock or use string or a rubber band to keep it down. This way the algae does not have the possibility of being sucked into your return pump, causing a mess in your tank and a pump that needs to be cleaned out.
  • Step 4: Add copepods or amphipods. Pour them directly into the refugium section. You can even use a baster to spray them on to the substrate and rocks.
  • Step 5: The copepods will need food, which is what the phytoplankton is for. There is no trick to putting it in. Just pour it all into the refugium. If you bought the Ultimate Refugium Starter Pack, you can also add the bacteria, even if it’s not a new tank.
  • Step 6: Let the refugium settle. It is important that you wait a while before you turn your return pump back on. This allows all the crustaceans, phytoplankton, and possibly bacteria to get into the deep pores and crevices of your refugium media and not get sucked out by your return pump.
  • Step 7: Add light and set a timer. Mount your light so that it lights your refugium in a efficient way for optimal growth. Set the timer so that the light comes on when your main display light turns off.

Maintenance on Refugiums

Maintenance on your refugium is simple. Harvest the macroalgae every two to four weeks depending on how fast it grows. That’s about it. Simple, easy, and very effective.

Congratulations! If you followed these instruction and tips you will now have had successfully set up your refugium. You will soon see your algae grow and the positive effect of having a refugium for your saltwater aquarium.

 

Reader Interactions

Comments

  1. khigh says

    February 22, 2019 at 9:46 pm

    It seems you can keep the light on 24/7. Is there a reason not to?

    Reply
    • Gary says

      May 6, 2019 at 3:19 pm

      I do

      Reply
      • cliff says

        May 6, 2019 at 5:33 pm

        ?

        Reply
    • Rudy Brambier says

      May 7, 2019 at 8:42 am

      I found with proper lighting you don’t need and even get better growth on a reverse daylight schedule. That way you balance your Ph at night. A good grow light does not need to be on all the time.

      Reply
    • Karen says

      May 13, 2019 at 5:41 pm

      Good article

      Reply
  2. Adrian Palau says

    March 21, 2019 at 3:55 am

    I’ve been struggling with hair Algea and can’t seem to get my Cheato to take off.

    Reply
    • Neil Daley says

      May 13, 2019 at 5:56 pm

      A quality light for a few hours a night, good flow, give it a shake once in a while to get the gunk off, and the chaeto will grow. If your fuge is under your tank in a regular stand, be sure you enough height between high output lights like the Kessil H360 and the water surface. That is my set up and I scorched some chaeto before learning to reduce my time and pull the light back as far as I could – about 8 inches above the water line. I have 10X flow in my sump but it still will not spin the chaeto to keep it from burning. Now the chaeto is thriving with 6 hours of light nightly and my nutrients are at near zero using Triton method.

      Reply
  3. Neil Drury says

    March 24, 2019 at 5:16 pm

    I just finished plumbing my fuge. Starting it up tomorrow. Once it’s cycled I’ll be adding chaeto and pods.

    Reply
  4. Robert Blevins says

    March 29, 2019 at 5:38 pm

    I love all the diversity a refugium supplies to my reef

    Reply
  5. Mark Strachan says

    May 6, 2019 at 3:09 pm

    A healthy refugium is always a great indicator of a healthy biomass in the tank

    Reply
    • Edwin Boston Jr. says

      May 6, 2019 at 5:35 pm

      Best thing I did to keep my water parameters under control

      Reply
  6. Julia Burr says

    May 6, 2019 at 3:26 pm

    Thank you for the info.

    Reply
  7. Gordon Tuttle says

    May 6, 2019 at 3:30 pm

    Good luck to all entrants!

    Reply
    • greg.chernoff says

      May 6, 2019 at 4:14 pm

      Good luck to you too Gordon!

      Reply
  8. Elmer says

    May 6, 2019 at 3:33 pm

    Nice page, everything is cool

    Reply
  9. Tracy Schultz says

    May 6, 2019 at 3:38 pm

    I love your selection.

    Reply
  10. Rolando Llamas says

    May 6, 2019 at 3:39 pm

    This is just what I need

    Reply
  11. Nick Magnus says

    May 6, 2019 at 3:46 pm

    Good reading.

    Reply
  12. Joseph Post says

    May 6, 2019 at 3:47 pm

    I’ve been growing Chaeto in my display, but i may setup a refugium soon!

    Reply
  13. Joseph Post says

    May 6, 2019 at 3:50 pm

    I don’t have many copepod eaters in my reef, is it okay if there are an excess amount crawling on rocks/glass?

    Reply
    • greg.chernoff says

      May 7, 2019 at 7:08 am

      It is perfectly OK, and they are helping to keep your tank clean! Also, they are relatively self regulating, if there wasn’t enough food in the system you would undoubtedly have far less !

      Reply
  14. seitzjh says

    May 6, 2019 at 3:50 pm

    very informative!

    Reply
  15. Kenta Asazu says

    May 6, 2019 at 3:52 pm

    Awesome!!

    Reply
  16. Joseph Post says

    May 6, 2019 at 3:55 pm

    I should try setting up a refugiun on my next reef!

    Reply
  17. ponygirl112 says

    May 6, 2019 at 4:23 pm

    I need to clean out my refugium badly

    Reply
  18. brennanlottes says

    May 6, 2019 at 5:26 pm

    My tank has been going through the algae cycle and your mocha ogo in my fuge is growing like crazy

    Reply
  19. Rhonda L Swetnam says

    May 6, 2019 at 5:46 pm

    Thank you for the great information!

    Reply
  20. Manuel A Ferro says

    May 6, 2019 at 6:04 pm

    Thank you for the great information!

    Reply
  21. Charles W. says

    May 6, 2019 at 6:06 pm

    Good info!

    Reply
  22. Chad Sosby says

    May 6, 2019 at 7:41 pm

    ? love Algae Barn!

    Reply
  23. Usama Ch. says

    May 7, 2019 at 1:43 am

    Definitely will come in handy when we setup a refugium for our university coral farm!

    Reply
  24. Joshua Kerstetter says

    May 7, 2019 at 4:27 am

    Refugium time!

    Reply
  25. Tanya BAZALDUA says

    May 7, 2019 at 4:43 am

    Good read

    Reply
  26. Jon Andrianos says

    May 7, 2019 at 4:56 am

    Havent noticed as much algae since using their ocean magic

    Reply
  27. Leslie Pustilnik says

    May 7, 2019 at 5:44 am

    Nicely detailed information

    Reply
  28. Richard Quickley says

    May 7, 2019 at 6:22 am

    Good info

    Reply
  29. Richard Quickley says

    May 7, 2019 at 6:23 am

    Good to know

    Reply
  30. Richard Quickley says

    May 7, 2019 at 6:28 am

    That is some good ideas for next build

    Reply
  31. koon_kelly says

    May 7, 2019 at 8:34 am

    I don’t have a refugium. Might have to set one up now!

    Reply
  32. Christopher Burns says

    May 7, 2019 at 10:29 am

    wish i had the space for one

    Reply
  33. Chris G. says

    May 7, 2019 at 11:43 am

    Great info

    Reply
  34. Victoria Brewer says

    May 7, 2019 at 4:34 pm

    I love watching all the critters in my fuge

    Reply
  35. Dennis says

    May 7, 2019 at 4:52 pm

    Useful info!

    Reply
  36. jordan16leblanc says

    May 7, 2019 at 7:47 pm

    Wish I had the space for one. Had a massive one on the old tank

    Reply
  37. jamesdylanmccraw says

    May 7, 2019 at 9:23 pm

    Might make a Refugium later

    Reply
  38. Menerd The Menace says

    May 8, 2019 at 2:53 pm

    If you have ampapods already what would be a good copepod to introduce to your reef ?

    Reply
    • greg.chernoff says

      May 8, 2019 at 3:37 pm

      Our 5,280 blend provides three great species that will help clean algae and detritus from your system, they make a great compliment to amphipods!

      Reply
  39. Ryan says

    May 8, 2019 at 10:03 pm

    Neat stuff going on there

    Reply
  40. Ricky J Gronwall says

    May 9, 2019 at 7:15 am

    Definitely get the pods and phyto from algaebarn!

    Reply
  41. cmatson14 says

    May 11, 2019 at 2:55 pm

    Algae barn pods are the best. We have tried many others. These seem to keep my fish happiest.

    Reply
  42. Chris says

    May 11, 2019 at 4:44 pm

    Gotta have those fish!

    Reply
  43. Jack Goldstein says

    May 12, 2019 at 6:13 pm

    Tip: keep your refugium as dirty as possible

    Reply
  44. Jordan Preston says

    May 12, 2019 at 11:25 pm

    Best place to buy pods for sure!

    Reply
  45. Wesley Paulson says

    May 13, 2019 at 4:27 pm

    Love this content

    Reply
  46. Angel Moreno says

    May 13, 2019 at 4:31 pm

    Thanks

    Reply
  47. Ken Ishiki says

    May 13, 2019 at 4:35 pm

    I wish I had space for refugium

    Reply
  48. conner stumpf says

    May 13, 2019 at 5:08 pm

    Just got in my macro today. Cant wait to start growing

    Reply
  49. Douglas Campbell says

    May 14, 2019 at 6:29 am

    Do you have to use a substrate? I have everything I need for the refugium except the macroalgae and substrate.

    Reply
  50. Adrien says

    May 14, 2019 at 2:42 pm

    Definitely going to follow what this says!

    Reply
  51. Cardell White says

    May 19, 2019 at 10:06 am

    Great article, I will be following to setup my fuge!

    Reply
  52. hardguyy says

    May 20, 2019 at 3:40 pm

    nice

    Reply
  53. Savoury Kem says

    May 20, 2019 at 6:36 pm

    Interesting

    Reply
  54. Mike !! says

    May 20, 2019 at 7:03 pm

    Great info , thanks!!

    Reply
  55. Diana Aliprandi says

    May 20, 2019 at 7:11 pm

    Great article. I am upgrading my tank to a 75 gallon which will have a sump. I am planning out to do a review gym after reading your article

    Reply
  56. Compy Ginorio says

    May 20, 2019 at 7:14 pm

    Great reading, very helpful.

    Reply
  57. Carol Mauch says

    May 20, 2019 at 11:14 pm

    Thanks for the good useful directions!

    Reply
  58. Kevin R Gravier says

    May 21, 2019 at 12:15 am

    I would love to have the space to put refugium on my biocube, definitely on a bucket list for my reef aquarium.

    Reply
  59. Dwayne Newell says

    May 21, 2019 at 1:47 pm

    Patience and slow start up is the best way all g with adding the statues kit from algae barn.

    Reply
  60. Krish says

    May 21, 2019 at 10:18 pm

    Great info.

    Reply
  61. Joseponciano says

    May 27, 2019 at 11:37 am

    Did it 3 times no points ? Can you guys let me know if I commented on this post already lol..

    Reply
  62. mcc says

    May 28, 2019 at 9:27 pm

    I would like to set up a display refugium. Chaeto, does not look very attractive. Are there other effective algae’s that you would recommend that are also attractive?

    Reply
  63. Jorge says

    May 29, 2019 at 10:12 pm

    I cant wait to start my refugium with chaeto and copepods

    Reply
  64. Alyssa says

    June 3, 2019 at 2:02 pm

    Great article on refugium!!!

    Reply
  65. Andrew B says

    June 3, 2019 at 4:25 pm

    sweet!

    Reply
  66. chris head says

    June 3, 2019 at 4:36 pm

    Refugiums??? YEAH!

    Reply
  67. Tricia B says

    June 3, 2019 at 4:45 pm

    Great page!

    Reply
  68. Kris Kasarda says

    June 3, 2019 at 5:03 pm

    Great post!

    Reply
  69. cgault99 says

    June 3, 2019 at 5:18 pm

    Just started setting up the fuge on the 120.

    Reply
  70. Andrew says

    June 3, 2019 at 6:16 pm

    Great

    Reply
  71. Nick says

    June 3, 2019 at 6:33 pm

    Always love my reugiums

    Reply
  72. Carrie Harvey says

    June 3, 2019 at 7:29 pm

    Thanks for this great info

    Reply
  73. Kenneth Showman says

    June 3, 2019 at 9:02 pm

    I am currently in the process of building my in sump refugium. Already have a Kessil H380 and some Marinepure bio cubes. Just need to get some macroalgae, pods, and phytoplankton to complete. After research and reading reviews, Algae Barn is the only site I’ll be ordering from. Love that you guys carry only the best high quality products, and give knowledge information to help people make the right choices.

    Reply
  74. Adam says

    November 22, 2019 at 7:39 am

    Just about to set up a fuge for my 150g. Really appreciate this guide, thanks!

    Reply
  75. Regina Delph says

    December 30, 2019 at 3:51 pm

    Thank you so much for this opportunity to have a chance to raise my granddaughter around such beautiful fish.

    Reply
  76. Joe Chiellini says

    May 9, 2020 at 4:21 pm

    I have started my first reef tank. I am one week into cycling with Dr. Tims bacteria, 9 damsels in the tank, and miracle mud in the refugium. I am interested in adding chaeto and copapods, but I am not sure of the timeline. Do I wait another week to end my cycle and then add the refugium starter pack? Once started, how often do I replenish the copapods moving forward? Thank you.

    Reply
  77. Tiffany Bramlett says

    August 13, 2020 at 4:42 am

    This is great info!! I’m building my new 140 gallon Reefer XL525 and not sure when to add the refugium starter kit. Do I add before or after cycling the tank? This is the ONLY info I can’t seem to find a good answer to. Thanks in advance for any help or info.

    Reply
  78. chino10.24.10 says

    July 18, 2021 at 10:21 pm

    Very helpful info thanks

    Reply

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