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You are here: Home / Macroalgae / Cultivating Ogo and Sea Lettuce for Your Tangs
A Yellow and Blue Tang in a Marine Aquarium

Cultivating Ogo and Sea Lettuce for Your Tangs

by greg.chernoff

These days, it seems that most marine aquarists are reef aquarists. And reef aquaria almost always house one or more tangs. This should seem reasonable enough, as representatives of this sizeable fish family (Acanthuridae) are found in abundance in pretty much every shallow water coral reef ecosystem on Earth. But their strong presence in the wild is hardly the only reason that they are so often selected for display by saltwater aquarists. Many of them are beautifully (some you could say stunningly) colored and patterned. They are relatively hardy and readily adaptable to normal captive conditions. These are also very bold, active fishes with what some describe as “personality.” Tangs are especially rewarding for keepers who love to feed their fish, as they are notoriously enthusiastic eaters.

One notable characteristic of the family in general, and members of the genus Zebrasoma in particular, is their heavy reliance on algae in their diets. This is particularly remarkable in that algae grow in very meager quantities on most coral reefs. A hyperactive fish such as the yellow tang (Zebrasoma flavescens) consequently must graze nearly all day to meet their basal dietary needs.

Under the usual captive conditions in home aquaria, things might be a little different for a tang with regard to diet. Most significantly, much of what they consume is from packaged dry or frozen fare (not live) and thus likely has lost some palatability and nutritional quality during processing. Not quite perfectly natural in terms of taste and mouthfeel! And, prepared diets almost always have a significantly higher protein/carbohydrate ratio (even those “herbivore” formulas) than the natural tang foodstuff. It fortunately is possible to acquire the real thing–fresh, live seaweed! The best way to accomplish this is to grow it yourself in a great big planted refugium.

[macroalgae]

Getting Your Grow On

Yet one more thing that has contributed to the enduring popularity of tangs amongst aquarists are the animals’ habits of consuming nuisance turf and hair algae. Many cite algae control as the biggest reason they keep these animals. But, very quickly, even a single specimen will pretty much eradicate all algae it can reach and begin to grow hungry. The solution? Cultivate a large, lush seaweed bed in an area that is designed specially for plant growth (per substrate, lighting, etc.): A planted refugium!

Let’s just start by pointing out that there are numerous reasons to install a refugium on virtually any marine aquarium system. One common use is to promote large populations of resident microcrustaceans such as copepods (i.e. a place where they can feed, mingle and breed without constant harassment by predators). Macroalgae create a perfect biogenic habitat for pods of all kinds. As they grow, macroalgae also sequester or “absorb” nutrients from the water, thereby competing aggressively with nuisance algae throughout the entire system.

But there is one use of macroalgae that is–despite being so oft overlooked–of extreme value to those who have and love a tang. As the plant material starts to overgrow the environs of the refugium growth chamber, portions of the crop are harvested. This freshly harvested material is customarily thrown out with the trash. What would your tang think, watching aghast from behind a glass panel as you toss out piles of that delicious seaweed… without offering a mere pinch..?

If an edible macroalga is selected for refugium use, then your tangs just scored a regular source of their favorite nutritious snack (so long as you give it to them!). The overall nutritional quality of their diet will be improved yet further if more than a single species/type of seaweed is served.

The Perfect Palatable Pair

Let us just begin by saying that tangs have different preferences for different kinds of macro. Though wildly popular in the hobby on account of its excellent capacity for nutrient removal, Chaetomorpha is definitely not a favorite of tangs or herbivores in general. Therefore, while it is perhaps the best choice for algae reactor applications (where it resists compaction due to its tough, wiry form), this macro is not so great as a live food plant. The reason? It’s like eating a scouring pad. Chaeto is simply too tough for the fish to easily chew.

Guess what? There are not just one but two incredibly hardy macroalgae species that sequester nutrients at just as high a rate as chaeto and are extremely palatable to fishes. When you vary the animal’s diet by using more than a single source species, you provide a better diet compared to either species alone. And even though we’re mainly talking about mostly utilitarian applications here, it’s worth pointing out also that the two differ from each other in a complementary way aesthetically and arguably look much nicer together. This amazing duo is? The red algae red ogo (Gracilaria parvispora) and green algae sea lettuce (Ulva lactuca).

AlgaeBarn’s own Clean Sea Lettuce™ is bold and leafy and very, very green. Its broad fronds provide a massive amount of surface area for pods to forage on and hide within. This nitrate-phosphate sponge appreciates regular replenishment of trace elements (such as iron). AlgaeBarn’s fast-growing Red Ogo improves the seaweed bed structurally in that its frilly, lacey, bushy fronds act as spacers that allow for more thorough water circulation (i.e. improved aeration, waste dispersal, etc.). This trait is especially beneficial when the species is co-cultured with Ulva, as fronds of the latter have a tendency to cling together like sheets of wet paper when grown alone. Best of all, both are offered as selections in the CleanMacro™ Series of pest-free seaweeds. Your tangs couldn’t have gotten luckier!

[macroalgae]

Reader Interactions

Comments

  1. JAMIE RAYOS says

    March 12, 2019 at 9:08 am

    Read for the cope pod massacre to happen with the new mandarin’s

    Reply
    • Bob says

      April 30, 2019 at 3:19 pm

      Setting up a new refug now will be ordering macros soon

      Reply
    • Benjamin Hosaflook says

      May 1, 2019 at 9:52 am

      I’ve never owned a tang, as I just have a nano (10gal), but I feel like it’d be a great idea!

      Reply
  2. Dane says

    March 13, 2019 at 3:10 pm

    I don’t use chaeto, but I do use your pods!

    Reply
    • Adrian Palau says

      March 21, 2019 at 3:54 am

      How does that work?

      Reply
  3. Stefanie Grober says

    March 15, 2019 at 8:22 am

    We use chaeto in our sump , works great! Will have to buy some sea lettuce to grow, we’ve always fed dried seaweed

    Reply
  4. Angel Alcay says

    March 18, 2019 at 6:47 pm

    I love reading these ?

    Reply
  5. Tim says

    March 20, 2019 at 4:18 pm

    Can cheto and sea weed be grown in the Sam refugiun ?

    Reply
    • Sean Tadjeran says

      March 21, 2019 at 2:36 pm

      Yes, sea lettuce and chaeto can be grown in the same refugium!

      Reply
      • Greg giambrone says

        April 29, 2019 at 4:21 pm

        I bought some sea lettuce and ogo and Chaeto came as a hitchhiker! It’s all growing in the same fuge.

        Reply
  6. MaryAnn Litt says

    March 24, 2019 at 4:23 pm

    Can you grow the Red Ogo in the tank or must it be in the?

    We already have a lot of Chaeto growing in our refugium. We would like to add Ulva sea lettuce and Red Ogo, would we have to get rid of our Chaeto or can all three grow together in the refugium?

    Reply
    • Robert O'Toole says

      April 26, 2019 at 9:35 am

      I have all three in my refugium and doing great!

      Reply
    • Nicole Groff says

      April 29, 2019 at 4:21 pm

      Yes

      Reply
      • Derrick Cox says

        April 29, 2019 at 5:04 pm

        I have done this as well, only thing is you have to keep it trimmed or one will start to take over the other.

        Reply
  7. Angel Alcay says

    March 26, 2019 at 10:36 pm

    I miss my yellow tang

    Reply
  8. Robert Blevins says

    March 29, 2019 at 4:48 pm

    My fangs love your lettuce

    Reply
  9. Dave says

    March 30, 2019 at 2:34 pm

    Are ogo and sea lettuce ok to grow in display tank? I read some go algeas sexual and can make a mess in the tank. If not what algae’s are good for the D.T.? Thank you

    Reply
  10. Billy Letbetter says

    April 21, 2019 at 2:51 am

    After reading that I’m ready to grow some.

    Reply
  11. Billy Letbetter says

    April 21, 2019 at 2:52 am

    I’m ready to grow some.

    Reply
  12. Billy Letbetter says

    April 21, 2019 at 2:53 am

    What refugium light do you recommend

    Reply
  13. Joe says

    April 21, 2019 at 5:07 am

    This would be a perfect gift for my fish

    Reply
  14. Cole presley says

    April 21, 2019 at 10:52 am

    Good read

    Reply
  15. Vanessa ruiz says

    April 21, 2019 at 11:09 am

    I use a refugium on my system and have a fair amount of pods, however I would like to keep a Mandarin in the future , so pods is something I’m interested in learning more about

    Reply
  16. Christopher Mains says

    April 21, 2019 at 11:38 am

    My Dragonette is getting FAT!

    Reply
  17. Jodi says

    April 21, 2019 at 12:42 pm

    Learning so much, thanks.

    Reply
  18. nx.vash says

    April 21, 2019 at 9:56 pm

    love the blog posts

    Reply
  19. Stephanie says

    April 22, 2019 at 10:05 pm

    Love your pods

    Reply
  20. keshupsanj says

    April 24, 2019 at 6:08 am

    Best information.

    Reply
  21. masoncjones10 says

    April 24, 2019 at 11:57 am

    I love reading these they are so interesting

    Reply
  22. Jshicks21 says

    April 27, 2019 at 8:09 pm

    I grow both in my sump for free tang food!

    Reply
  23. Tanya Bazaldua says

    April 29, 2019 at 7:50 am

    I love all the products on this site. Especially the fuge setup kit.

    Reply
  24. John Burke says

    April 29, 2019 at 3:45 pm

    I am currently growin chaeto and Ogo. Having a hard time to get my pods to establish

    Reply
  25. Chas Johnson says

    April 29, 2019 at 3:56 pm

    I want free pods.

    Reply
  26. Magnus Nick says

    April 29, 2019 at 3:57 pm

    The AI fuge light works great.

    Reply
  27. Kris Kasarda says

    April 29, 2019 at 4:06 pm

    Never had luck growing Chaeto.

    Reply
    • nedaley says

      April 30, 2019 at 6:32 am

      Bright grow light, good flow, and a system that produces nutrients is all you need. I tried the florescent bulb and clamp light and it was just too weak. Chaeto growth was very slow. I now run a Kessil 380 in the fire and T5 on display tank. The Kessil keeps the chaeto growing so fast that their is no nutrients in the display tank for algae to grow there!

      Reply
  28. Victoria Brewer says

    April 29, 2019 at 4:09 pm

    Good read I hope to add these to my fuge when I upgrade to a larger tank plus I will be able to have tangs to feed!

    Reply
  29. Brian Ruffini says

    April 29, 2019 at 4:10 pm

    Good read

    Reply
  30. Steve Baring says

    April 29, 2019 at 4:15 pm

    OGO and Ulva are my favorite refugium algae’s.

    Reply
  31. SEAN PAGE says

    April 29, 2019 at 4:16 pm

    I’d love to cultivate anything for my Tang to eat… He likes to grab the stuff off The return jet then he blows around like a snowflake in a flurry.

    Reply
  32. Shawn says

    April 29, 2019 at 4:20 pm

    Going to try the let us always used dried seaweed

    Reply
  33. Carol Mauch says

    April 29, 2019 at 4:41 pm

    Excited to try these in my new build!

    Reply
  34. Garrett Dykes says

    April 29, 2019 at 4:55 pm

    I probably need to get some lettuce, but i heard it overtakes your fuge. Currently using ogo and chaeto

    Reply
  35. Todd says

    April 29, 2019 at 4:57 pm

    My tangs love them both!

    Reply
  36. Kathryn Ertl says

    April 29, 2019 at 5:15 pm

    Are there any smaller fish that would eat these macro algaes?

    Reply
  37. Nicholas Pettit says

    April 29, 2019 at 5:16 pm

    Interesting read

    Reply
  38. Emily Long says

    April 29, 2019 at 5:26 pm

    This makes me want to have more tangs.

    Reply
  39. brennanlottes says

    April 29, 2019 at 5:33 pm

    I’m ready to grow some seaweed

    Reply
  40. Daniel says

    April 29, 2019 at 5:36 pm

    I would love to have tangs, but my tank is too small.

    Reply
  41. Corie Helms says

    April 29, 2019 at 5:40 pm

    I’ve always used dry, will have to check into growing my own.

    Reply
  42. James G says

    April 29, 2019 at 6:00 pm

    I do not have a planted tank, but my fuge grows Red Ogo, and my tangs both eat it up, kind of like feeding veggies to your kids, just don’t tell them it is good for them!

    Reply
  43. Richard Quickley says

    April 29, 2019 at 6:00 pm

    I only use chaeto In My refugium

    Reply
  44. Matt says

    April 29, 2019 at 6:17 pm

    You guys are awesome!

    Reply
  45. Foster L White Jr says

    April 29, 2019 at 6:51 pm

    Great read, I have some tangs and never really considered doing this.

    Reply
  46. Allen Penner says

    April 29, 2019 at 6:59 pm

    I only grow lettuce now

    Reply
  47. Jordan says

    April 29, 2019 at 7:05 pm

    Wish I had the space

    Reply
  48. Ricardo munoz says

    April 29, 2019 at 7:13 pm

    Love yalls products

    Reply
  49. Stacey Pope says

    April 29, 2019 at 7:49 pm

    Great information!

    Reply
  50. David says

    April 29, 2019 at 9:52 pm

    I’d love to add a refugium to my tank. I need an overflow box and a sump, but I think it would be an excellent addition. I like the idea of using macro algae to remove nitrates and phosphates.

    Reply
  51. Jennifer Mumbower says

    April 29, 2019 at 10:13 pm

    I am growing both sea lettuce and chaeto in mine!

    Reply
  52. mecaveman says

    April 29, 2019 at 10:28 pm

    great info

    Reply
  53. James Higgins says

    April 30, 2019 at 12:10 am

    Food for thought

    Reply
  54. Compy Ginorio says

    April 30, 2019 at 1:39 am

    I’m my upgrade I’m designing a double chamber refugium. One for cheeto and the other for ogo and or sea lettuce. If I could have the benefit of exporting nutrients and from that I could feed my fish. That’s a win, win!!!

    Reply
  55. jam5146 says

    April 30, 2019 at 4:21 am

    Wonderful products.

    Reply
  56. Travis oglesbee says

    April 30, 2019 at 4:29 am

    Self growing food. Who doesn’t want free nutritious food

    Reply
  57. Robert Parker says

    April 30, 2019 at 5:54 am

    Cheato sucks

    Reply
  58. Matt Kalender says

    April 30, 2019 at 6:49 am

    My tank is only 60 gallons so I don’t have tangs. But I grow red ogo in the refugium for it’s other benefits.

    Reply
  59. Josh Hiltabiddle says

    April 30, 2019 at 6:58 am

    Can’t wait to get my pods and phyto!

    Reply
  60. billymumford0 says

    April 30, 2019 at 7:00 am

    I give tons of sea lettuce to my friends with tangs.

    Reply
  61. renner.nate says

    April 30, 2019 at 7:27 am

    I like the sea lettuce, it is a very fast grower

    Reply
  62. Malachi Inabnit says

    April 30, 2019 at 7:36 am

    Thank you guys for these great informative blogs!

    Reply
  63. Kyle watts says

    April 30, 2019 at 7:38 am

    Awesome

    Reply
  64. Ken says

    April 30, 2019 at 9:16 am

    i’ll try sea lettuce next

    Reply
  65. Jeremy Butwina says

    April 30, 2019 at 9:29 am

    My tangs n all of my fish love my Nori.

    Reply
  66. Leslie Pustilnik says

    April 30, 2019 at 9:44 am

    I need to order some sea lettuce in my next order!!

    Reply
  67. William Smithee says

    April 30, 2019 at 10:07 am

    I may try this out. I only have 1 tang currently, but I hope to have a “Tang Gang” by the end of this year.

    Reply
  68. Rhonda Swetnam says

    April 30, 2019 at 12:11 pm

    Great article! I have a Yellow Eye Kole Tang and will be ordering some red ogo (Gracilaria parvispora) and green algae sea lettuce. Thanks for all of the great information Algae Barn!

    Reply
  69. Bryan Pierre says

    April 30, 2019 at 6:52 pm

    I use sea lettuce cant wait to get some tangs to feed them

    Reply
  70. Jonathan Pinero says

    April 30, 2019 at 7:35 pm

    I have an all in one but wouldn’t mind putting a refugian In one of the chambers.

    Reply
  71. jamesdylanmccraw says

    April 30, 2019 at 7:57 pm

    I was wondering how to care for the algae and the Benefits from having algae

    Reply
  72. Horace says

    May 1, 2019 at 6:47 am

    One will frequently outgrow the other, to keep them trimmed, requires even more Tank maintenance…..

    Reply
  73. Nicole Radice says

    May 1, 2019 at 8:41 am

    My tank isn’t big enough for tangs

    Reply
  74. Renae911 says

    May 1, 2019 at 10:18 am

    Very useful information! Thank you

    Reply
  75. Ben Wehmann says

    May 1, 2019 at 11:49 am

    Get your sea lettuce from Algae Barn and not Ebay, I made that mistake and it came with lots of other unwanted pests.

    Reply
  76. Christopher Burns says

    May 1, 2019 at 12:02 pm

    sadly the tang police would come get me if i put one in my tank

    Reply
  77. Justin Grove says

    May 1, 2019 at 12:35 pm

    How many pods would a fish eat, if a fish had pods to eat?? A lot…

    Reply
  78. Sally says

    May 1, 2019 at 12:55 pm

    I am now almost 2 months into cultivating the most beautiful red orzo and sea lettuce. My Tangs love the clippings!! They somehow know when I am trimming! Love the concept of using my own grown veggies for the kids.

    Reply
  79. Judah Chepil says

    May 1, 2019 at 2:02 pm

    Thanks for the info

    Reply
  80. Donny says

    May 1, 2019 at 8:12 pm

    My tangs and blennies love the macros that I feed.

    Reply
  81. Mike says

    May 1, 2019 at 9:16 pm

    I have always bought kelp from the Asian market for my tangs but might be worth a try.

    Reply
  82. stephanie says

    May 15, 2019 at 10:43 am

    My tangs don’t like the sea lettuce but they LOVE the ogo so I buy it regularly; I plan to redo my refugium so I can grow it; right now it’s full of chaeto

    Reply

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