rtn

Hi all, I’m feeling really frustrated and know much of this is my fault. My tank, a 6-month-old Red Sea 200, was thriving—alkalinity consumption increasing, corals with open polyps, and everything looking healthy. Even though I QT’d my fish, I noticed some flashing. Knowing my LFS has flukes...

Tank is 180gallon. 18 months old, started from dry rock and sand. All sps. Everything was doing ok, not the best growth but growth until late March. The Acropora started to die off. My Montipora frags still are growing but at this point I lost around a dozen frags. Around that time I did switch...

I'll preface this by apologizing for the long post, but I'm all out of ideas and my parameters don't tell the story happening in my tank right now, so a lengthy backstory is the only info I have. ICP results are below, but basicly corals started RTN/STN slowly wasting away along with red cyano...

Help! I’ve been having issues with SPS for months now. Every SPS I introduce to the tank develops RTN within 48 hours. All of my LPS corals are doing fine. Even this coral has good polyp extension when in the water. I have not seen any pests on them, but i could just be overlooking. I added this...

Hello all, I picked up this favia around 3 weeks ago and have noticed tissue reccesion over the last few days. it’s sitting Lower in my tank but direct light and pretty low flow. I know that corals can have a delayed reaction, do you think it could just be shocked from the system change? My...

Hey everyone so I’ve been fighting to get my parameters stable since the tank is relatively new. I tested my parameters 3 weeks ago for the first time after losing 2 torches and saw I had extremely high phosphorus 3.9 ppm trying to feed all my tangs so they’re happy and stop fighting. Since then...

Hi hive mind! I am farely new to SPS. My tank is 2,5 years old, it is a RedSeaReefer 200XL. It has an skimmer, RedSea90LED and a dosing pump currently dosing only alk. In the tank I have multiple Nero 3s. I have 6 small fish, some inverts, zoas, some lps and a thriving pocillopora and stylphora...

In reefing you sometimes need to act fast! I moved this Miami Orchid SPS coral colony higher on the reef the other day and unfortunately it did not like that move at all! By the morning it was turning white (dying) from the base up. ☠️ I believe it to be RTN (rapid tissue necrosis). As soon...

Hello everyone, I need some help with my acros. As the lights go on, they look great. Polyps are out and they look healthy. Now as soon as lights start turning off all polyps retract fully. This has happened twice already in the last week but all my other corals look healthy 420 calc 9.0 alk...

I’m having some really weird stn issues going in in my tank. It’s a 10 gallon and has been going good for a couple weeks i’ve been having some really bad tissue loss on some sps and some lps that i have no idea what it is or what to do to treat. 1.025 sg P04 0.00 (hanna phosphate ULR) NO3 8.0...

Hey guys over the last three weeks my encrusting and happy Bill Murray SPS has been suffering from what I can only guess is STN. I’ve had RTN years ago, but this is completely different. It started with the backside becoming white but leaving the tips still colored, if that makes sense. Over...

Hi, I recently lost several of my acroporas to STN. They were doing really well, but I ran into a destabilization issue recently. I had a really bad briopsis infestation and treated with ReefFlux for two and a half weeks. Once per week I did a 20 gallon water change (it's a 75 gallon system, so...

Hi everyone. You may think what you’re about to read is crazy or a joke. Just hear me out and then let me know what you think. One week ago I added a starry blenny to my mixed reef (took me 3 months to find one locally). Main purpose was for him to eat some random GHA. Not a big issue, just...

Hi All, I don't post on reef2reef all that often since i am also active on a country specific forum, but i do read a lot on reef2reef. I am a long time SPS keeper (20 years now), but am currently facing something i have never seen before. First some background information about the system: The...

Hey guys! My name is Davis, and I have a 20g Peninsula from Innovative marine. My 20g has been setup for two months but was a direct transfer from my 14g peninsula that had been running for 9 months prior to the move. total live rock age was about 11 months in my system. at the time in my...

SPS tissue degradation and loss, whether its slow (STN) or fast (RTN) or associated with a brown gelatinous mass (BJS) are probably one of the more or even most frequently discussed topics here. A particular emphasis is given on the „help“ requests describing the fast peeling and patchy loss of...

I recently acquired a red montipora from my friend one week ago. All of the sudden it appears the tissue is falling off. Within eight hours it is halfway gone. All of my water parameters are in line and the only thing I can think of is possibly my lighting may be stronger than my friends. I...

I have read recently - that dinoflagellates 'kill corals and fish' - I noticed (after months with none) - and after a failed alkalinity doser that some parts of a couple corals died off - On those dead places - some dinoflagellates have started growing. They are not on any other rock, etc -...

I haven’t had much success growing sticks.. things start off well for a few weeks and then slowly see tissue peeling away, algae growing on them, or white white white edges.. any idea? parameters are in check: 1.025 salt 78.6 temp Alk 7.7 Cal: 443 Phos 0.19 Nitrates: 4.77 Mag 1380 tank is less...

Hi, I am starting to get into SPS and I just bought a frag from a local fish store. I just noticed white at the bottom and I am not sure what it is. I was hoping y’all could educate me. Thanks!

So I come down to make coffee this morning and find this happening in my QT tank, PO at .5ish tested twice Ammonia: 0 Nitrite: 0 Nitrates: 10 Ca: 415 Alk: 8.3 Mg: 1230 Gonna do a water change, probably head to the store today to grab some phosguard. Any other suggestions? Should I pull the...

As you can see the JF Kamikazi on the bottom left is RTNing pretty fast noticed it about 3 days ago. I am going to cut it up. However, last night I noticed the monti was getting the white fuzzy almost fuzzy like spots. Is this also dying or is something eating it? I have been observing them for...

I've just noticed some RTN on a tort frag. I haven't had any alk swings since this frag was added and it was in a low light area of the tank Could it possibly be a pH swing? My tank size is 88gallons and I usually dose my alk "baking soda" 0.6 tsp mixed in warm rodi dosed into sump at night. My...

Alright, where to to begin. I have had a 80 gallon with a 30 gallon sump tank running for almost a year and a half after a restart. I got dry rock and dry sand, which is a mistake on my part, and I am on a fun roller coaster right now. Around 5 months into my restart things were going okay...

There is a lot of talk about curing Rapid Tissue Necrosis (RTN) and Slow Tissue Necrosis (STN)Lately. How do people deal with it? In the comment section - please post how successful the treatment was - and why you used your particular method. Though it might have been better to allow people...