General Aquarium Discussion We're talking about aquariums, reef tanks, reef chemistry, do it yourself projects, aquarium equipment, and much more.
Reef Aquarium Discussion
Discuss all saltwater and reef aquarium related topics here. Have a question or general aquaria thought? Share it here.
- Threads
- 164,662
- Messages
- 2,317,783
Meet & Greet Forum
New to R2R? Introduce yourself here and tell us a little about yourself and your tank!
- Threads
- 22,641
- Messages
- 599,534
New to Saltwater & Reef Aquariums? Post Here
If you're new to the Saltwater Hobby and have questions please post them here. So you finally decided to take the plunge. The only dumb question is the one you don't ask!
- Threads
- 52,404
- Messages
- 560,959
Reef Chemistry by Randy Holmes-Farley
Need some help with the chemistry aspect of your aquarium or have some knowledge you would like to share? Please start a new topic. This forum is moderated by Randy Holmes-Farley.
- Threads
- 30,436
- Messages
- 442,042
Reef Hobbyist Experiments and Research Forum
A place where reef hobbyists can conduct, collaborate on, and discuss experiments and research to benefit reefing. These might include but are not limited to: 1) Microbiology experiments - including cycling, 2) Product experiments., 3) Quarantine experiments., 4. Theories based on new trends in reefing, and 5) other types of research.
- Threads
- 399
- Messages
- 8,194
Aquarium Nutrition
Discuss the nutrition aspects of feeding fish, coral and inverts to keep them healthy and thriving.
- Threads
- 3,316
- Messages
- 36,276
Hitchhiker & Critter ID
Need help figuring out what something is? Post a thread with a photo! ID your hitchhikers and critters here!
- Threads
- 32,942
- Messages
- 242,875
Aquascape Discussion
Aquascaping is as much an art as it is a science. Here's a forum for discussing all things related to aquascapes. Got tips to share? Post them here! Need some help? We're here to help!
- Threads
- 4,041
- Messages
- 45,531
Do It Yourself (DIY)
DIY projects can save money and also be fun and interesting. Share your projects and learn from many others here.
- Threads
- 14,775
- Messages
- 213,084
Equipment Discussion for Saltwater and Reef Aquari Equipment, Lighting, Hardware, Aquarium Filtration, Controllers, Skimmers, Powerheads, etc.
General Equipment, Hardware, Filtration
If you have aquarium equipment questions or ideas this is the place to do it. Discuss aquarium pumps, filters, skimmers, refugiums, reactors, and much more.
- Threads
- 63,094
- Messages
- 611,188
Aquarium Lighting
Discuss all topics pertaining to aquarium lighting. LED, Metal Halide, T5 etc.
- Threads
- 21,072
- Messages
- 249,230
Aquarium Controllers
This forum is dedicated to all Aquarium Controller Discussion. Share your experience as well as learn from others.
- Threads
- 9,477
- Messages
- 107,787
Saltwater Aquarium Fish Forum This is the place to talk about saltwater fish, anemones, seahorses, pipefish, fish breeding, and more!
Fish Discussion
Discuss all topics related to salt water aquarium fish. Angelfish, Anthias, Basslets, Blennies, Butterflyfish, Clownfish, Damsels, Dottybacks, Eels, Gobies, Jawfish, Lionfish, Pipefish, Puffers, Rays, Seahorse, Tangs, Triggerfish, Wrasse, and more.
- Threads
- 35,404
- Messages
- 453,405
Fish Disease Treatment and Diagnosis
A forum for discussing treatment and diagnosing saltwater reef fish.
- Threads
- 28,575
- Messages
- 377,215
Fish Breeding Forum
This is the place to discuss and share about saltwater fish breeding. Got a question or want to talk about your experience? Please join in!
- Threads
- 1,687
- Messages
- 19,668
Anemone & Clownfish Discussion
Discuss Ocellaris, Percula, Maroon, Tomato, Cinnamon, Pink Skunk, Clarkii, as well as designer clownfish such as Picasso, Snowcasso, Onyx, Platinum, Snowflake, etc. Also discuss anemones such as Bulb Tip, Long Tentacle, Ritteri, Sebae, Carpet, Tube, and more.
- Threads
- 14,340
- Messages
- 161,711
Predatory Fish Discussion
This forum is for the discussion of predatory fish.
- Threads
- 1,645
- Messages
- 23,084
Seahorse/Pipefish
Seahorse and Pipefish Discussion.
- Threads
- 1,093
- Messages
- 14,445
Coral Discussion Whether you like the colored sticks or the soft flowing coral this is the place! Talk about Sps, Lps, Zoas, Soft Coral, Mushrooms and more.
General SPS Discussion
Discuss and post your questions about all SPS or Small Polyped Stony corals such as Acropora, Montipora, Stylophora, and all other hard corals.
- Threads
- 22,433
- Messages
- 350,578
General LPS Discussion
Discuss and post your questions about all LPS or Large Polyped Stony corals such as Acans, Elegance, Doughnut, Candy Cane, Brains, Button, Hammers, Torch, Plate, and all other LPS hard corals.
- Threads
- 25,837
- Messages
- 259,785
Soft Coral Discussion
Discuss and post your questions about all Soft corals such as Toadstool, Kenya Tree, Mushrooms, Cabbage, Spaghetti, and all other soft corals.
- Threads
- 8,466
- Messages
- 77,680
Zoa Discussion (CLUB ZOA)
Discuss and post your questions about all Zoas, Zoanthid or Colonial Polyp corals and Palys. (Rastas, Candy Apple Reds, Red Hornets, Dart Mauls, Purple Hornets, Nightmares, PPE, Sunny D, Armageddons, Mohawks, and more)
- Threads
- 17,710
- Messages
- 190,057
- Threads
- 2,757
- Messages
- 23,121
Propagation, Packing, and Shipping Discussion
Talk about propagation techniques, show of your prop setups, as well as packing tutorials and shipping advice.
- Threads
- 1,928
- Messages
- 20,780
Algae Discussion We're talking about all kinds of algae here! If you love to grow macros, this is the place! Got a problem with nuisance algae? Post up here!
Nuisance Algae (including bacteria)
Need help with nuisance algae, cyanobacteria, or dinoflagellates? Maybe you just need an ID of what you have in your tank? This is the section for you.
- Threads
- 13,970
- Messages
- 158,318
Macroalgae (all types of desirable algae)
This is the forum for discussing all types of macros (chaeto, caulerpa, gracilaria, halimeda, or any other kind of macro you can think of)! Need tips for growing or troubleshooting desirable algae? Wanna show off your macroalgae display or refugium? Post here!
- Threads
- 2,383
- Messages
- 22,385
Saltwater Invert Discussion We talk about all the cool invert critters here! Crabs, Clams, Octopus, Snails, we got it all!
Clams
Talk about Tridacnid Clams and other Mollusks such as Crocea, Derasa, Maxima, Squamosa, and more.
- Threads
- 2,548
- Messages
- 35,706
General Invert Forum
This is the place to ask questions and to discuss all saltwater marine inverts. Discuss Shrimp, Snails, Starfish, Crabs, Cucumbers, Sea Slugs, Lobsters, Fan Worms, Sponges, Urchins, and more.
- Threads
- 11,479
- Messages
- 95,609
Mantis Shrimp
A place to talk about everything Mantis Shrimp
- Threads
- 491
- Messages
- 6,212
Member's Aquarium Discussion Please share your aquarium set ups here! Whether you have nano aquarium, mid-size box of glass, or an indoor swimming pool for fish this is the place to be.
Member Tanks
Show off your tank and document your progress.
- Threads
- 20,995
- Messages
- 1,067,938
- Threads
- 265
- Messages
- 18,378
Large Aquariums 180g - 399g
A forum for people interested in keeping large aquariums. This forum is dedicated to water volumes of 180 gallons to 399 gallons. Anything more is a monster tank!
- Threads
- 2,886
- Messages
- 203,590
Monster Tanks 400g+
A forum for people interested in keeping the largest aquariums. This forum is dedicated to water volumes of 400 gallons and larger.
- Threads
- 595
- Messages
- 145,088
Nano Reefs
Got a nano? Well here is a place for all you nano lovers to hang!
- Threads
- 5,686
- Messages
- 122,653
All In One Aquariums (AIO)
Discuss All In One aquariums like Red Sea, JBJ, Innovative Marine, Coralife, etc. AIO aquariums come with most everything you need to set up a saltwater aquarium in one package.
- Threads
- 3,384
- Messages
- 67,908
Cube Aquariums
For all you cube keepers!
- Threads
- 1,150
- Messages
- 36,939
Aquarium Photography, Video, and more discussion. This is the place to share and drool over some of the best aquarium videos and pictures in the hobby. We're also talking about the TV series TANKED!
Photography Forum
This forum is for photography discussions, talk about equipment, techniques, or just show off.
- Threads
- 5,599
- Messages
- 72,099
Videography Forum
This forum is for reef video discussions, talk about equipment, techniques, or just show off.
- Threads
- 1,202
- Messages
- 8,274
Buy, Sell, Trade Coral, Fish, and Equipment If you're looking for a new fish, sweet piece of coral, or fancy gadget this is the place. Buy, Sell, and Trade here!
- Threads
- 8
- Messages
- 26
- Threads
- 5
- Messages
- 53
Sponsor Livestock & Drygood Sales
Check this forum out for direct sales from our Reef2Reef Sponsors.
- Threads
- 2,651
- Messages
- 20,625
Selling Forum (livestock)
This forum is for selling coral, fish, and anything else that lives in our tanks.
- Threads
- 38,247
- Messages
- 335,926
Selling Forum (dry goods)
Please use this forum for any hardware or dry good sales.
- Threads
- 62,475
- Messages
- 436,250
- Threads
- 572
- Messages
- 5,940
Trading Forum (livestock)
This forum is for trading coral, fish, and anything else that lives in our tanks.
- Threads
- 2,799
- Messages
- 16,353
Trading Forum (dry goods)
Please use this forum for trading any hardware or dry goods.
- Threads
- 2,920
- Messages
- 11,620
Wanted To Buy (livestock and dry goods)
Post here if you are looking to buy certain corals or hardware and dry goods.
- Threads
- 27,467
- Messages
- 89,815
How to Price It?
Not sure how to price something you're thinking about selling? Here's a place to get some opinions.
- Threads
- 869
- Messages
- 2,979
Seller / Trader Feedback
This forum is for leaving feedback from trades or sales with other members.
- Threads
- 3,258
- Messages
- 10,522
R2R Forum Interest Everything that pertains to the R2R community and site is here. Forum feedback, giveaways, contest, frag swaps and more!
Announcements
Here is the place to post all announcements for aquarium society meetings, reef club activities, frag trades and other local events. This is also the place for all R2R forum info.
- Threads
- 2,413
- Messages
- 57,665
Forum News / Feedback
Lets hear your comments and suggestions for the website.
- Threads
- 2,307
- Messages
- 26,711
R2R Giveaway and Contest Forum
This is where we will announce all giveaways and contest!
- Threads
- 571
- Messages
- 273,741
R2R Secret Santa 2025
It’s the jolliest corner of the reef—where reefers become elves, frags become festive, and mystery packages bring holiday cheer (and maybe a little salt creep). Swap wishlists, share shipping updates, and spread some coral-coated joy. Whether you’re gifting powerheads, pods, or polyps, just remember: the best part of reefing is surprising someone with something awesome. Ho-Ho-Hold my salinity, it’s Secret Santa time!
- Threads
- 4
- Messages
- 437
Reef Aquarium Spotlight
Aquarium Spotlights (Past and Present)
- Threads
- 58
- Messages
- 2,677
R2R Spotlight Series
Here we spotlight coral, fish, shipping procedures and more.
- Threads
- 50
- Messages
- 1,046
- Threads
- 16
- Messages
- 233
Lounge
This forum is for off topic discussions.
- Threads
- 10,583
- Messages
- 231,457
Reef Conservation & Restoration Partners Reef2Reef is proud to partner with organizations that are working to conserve and restore our ocean's ecosystems.
Ocean Rescue Alliance
Saving Our Oceans, One Reef at a Time!
Conserving Coral Reefs Through Restoration, Research, Eco-Tourism, & Education
- Threads
- 19
- Messages
- 48
- Threads
- 4
- Messages
- 193
Reef Trade Shows & Swaps Saltwater Reef Aquarium Trade Shows and Frag Swaps
Frag Swaps & Local Reefing Events
Start a topic here if you have a Frag Swap, Club Event, or any general Reef Related Event coming up.
- Threads
- 805
- Messages
- 6,448
Supporting Members Discussion Forum
This Forum is just for Supporting members and can't be viewed by non Supporting members.
Private
Supporting Members Selling/Trading
This Selling/Trading Forum is just for Supporting members.
Private
Supporting Member Giveaway and Discount Forum
This Forum is for all the Supporting Member Giveaways!
- Threads
- 190
- Messages
- 32,618
Local Reef Club Discussion If you would like to start a reef club forum for your area please select the contact us link at the bottom of the page and submit your request.
Private Reef Club Leaders
If you are a local reef club president, board of directors or leader of a local group and want to be able to discuss topics and issues that pertain to the local reef club please click here. This is a private forum for reef club leaders only.
Local Reef Club Discussion
Looking for some locals to share frags and info with? This is the place! Find a local club that meets in your area! If you want to add your club just contact us.
- Threads
- 30,195
- Messages
- 281,983
Global Local Reef Club Discussion
Looking for some locals to share frags and info with? This is the place! Find a local club that meets in your area! If you want to add your club just contact us.
- Threads
- 336
- Messages
- 3,592
Sponsors Check out all of our most awesome sponsors! These reputable vendors have it all! Coral, saltwater fish, equipment, and more, look here first!
- Threads
- 307
- Messages
- 850
- Threads
- 2,299
- Messages
- 136,968
- Threads
- 227
- Messages
- 1,750
- Threads
- 132
- Messages
- 184
- Threads
- 1,534
- Messages
- 23,899
- Threads
- 77
- Messages
- 275
- Threads
- 1,235
- Messages
- 129,485
- Threads
- 2
- Messages
- 264
- Threads
- 6
- Messages
- 13
- Threads
- 4
- Messages
- 1,202
- Threads
- 2,406
- Messages
- 6,946
- Threads
- 28
- Messages
- 128
- Threads
- 24
- Messages
- 142
- Threads
- 23
- Messages
- 18,503
- Threads
- 20
- Messages
- 135
- Threads
- 119
- Messages
- 17,888
- Threads
- 203
- Messages
- 5,438
- Threads
- 110
- Messages
- 452
- Threads
- 210
- Messages
- 48,646
- Threads
- 1,255
- Messages
- 13,550
- Threads
- 1,691
- Messages
- 12,497
- Threads
- 1,229
- Messages
- 36,430
- Threads
- 21
- Messages
- 138
- Threads
- 541
- Messages
- 5,750
- Threads
- 12
- Messages
- 691
- Threads
- 10
- Messages
- 768
- Threads
- 23
- Messages
- 1,094
- Threads
- 2
- Messages
- 8
- Threads
- 706
- Messages
- 66,857
- Threads
- 564
- Messages
- 121,607
- Threads
- 32
- Messages
- 1,297
- Threads
- 82
- Messages
- 1,003
- Threads
- 219
- Messages
- 17,075
Latest posts
-
-
-
Pencil urchin showing no signs of movement - help appreciated!
- Latest: UncommonSense
-
-
-
High alk saltwater mixes makes so sense to me.- Latest: FranklinDattein
Trending content
-
-
-
Thread 'TCK CORALS: Live Coral Auction Event This Weekend | Sept 12th & 13th'- TCK Corals
Replies: 235 -
-
Forum statistics
Share this page
