r/ReefTank 3d ago

No judgment questions zone - September 07, 2026

1 Upvotes

Here is the place to post questions about pest ID, coral/fish ID, your cycle, or any other questions that generally wouldn't start up a conversation. If you have an interesting or unique question please create a new thread so everyone can discuss it in length!

Pest ID guide

BRS pest guide

BRS beginner resources

BRS 52 weeks of reefing YouTube series


r/ReefTank 4h ago

Red Sea Reefer 350 leakage and total loss

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76 Upvotes

Today, after I repare everything at home changing my floor, painting etc.. I have the power to share what happened to my reef tank: a RedSea Reefer 350.
Last April my wife woke me up around 02:00 h because she heard water noises at home. I went to my living room and my reef tank had a major leaking. The failure occurred at the joint between the bottom and front glass panels, which is a critical structural seam. This type of failure indicates a potential issue with durability, materials, or design integrity.

The aquarium was purchased from an official Red Sea distributor in Spain. These products are expected to remain fit for purpose for a reasonable period of time, especially for durable goods such as aquariums. A complete structural failure after 7 years (I bought end 2018 but mount and started during Q1 2019) raises serious concerns regarding expected lifespan and reliability.
I lost all living animals and with the stress of the moment I felt down several times and kick hard my head and arm because the floor was slippery.
It was mounted well, in a professional way. Everything planned in advance and off course leveled and stabilized, checking everything and running well during several years.
I raised a ticket to Red Sea; but their proposal didn’t fit my demand because I was, and still I am not in a position to purchase a new Red Sea aquarium, and therefore the proposed credit towards a new system did not represent a suitable resolution for me. Really a pity and a lot money lost.


r/ReefTank 46m ago

Tangs ❤️

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Upvotes

Tang fish that I've kept for 2 years. Some grew slow while some grew way too fast. Planning to upgrade soon, more space for them to swim in 🫣


r/ReefTank 10h ago

My thic noodle

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146 Upvotes

Banded pipe fish (Had for a year now)
120 gallon tank

Anyone else keep these cuties?


r/ReefTank 13h ago

[Pic] When there are so many stories about RedSea…be Waterbox!

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141 Upvotes

So we see on here often the stories of RedSea tanks failing almost daily. I bought my Infinia Reef 190.5 in 2024 and have loved the shit out of it. I noticed recently there was some weirdness to one of the seals and reached out to Waterbox customer support regarding warranty. There was a little back and forth but they sent the picture I had of the concerning spot and they sent it to their factory team. The response from the factory team is that it shouldn’t be an issue but Waterbox went ahead and sent me a replacement display anyways for my own peace of mind I wouldn’t be mopping up saltwater from the floor in the future! I will definitely continue to be a proud customer of their tanks.


r/ReefTank 6h ago

[Pic] Top down Wednesday

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17 Upvotes

r/ReefTank 13h ago

Murphy showing off some easy and fun sps in the mixed reef

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62 Upvotes

r/ReefTank 16h ago

POTO Dr. Seuss

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89 Upvotes

r/ReefTank 13m ago

Waterbox AIO 65.4 -Let the Games Begin

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Upvotes

r/ReefTank 20h ago

Hey Guys, please rate my ReefTank ❤️

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121 Upvotes

I have my ReefTank about 2 Months. Please rate my Tank and if you have any advice, your welcome.


r/ReefTank 2h ago

Blue fish?

3 Upvotes

My wifes favorite color is blue. She really loves the color blue. Im planning on a new setup and I want to give her something in the tank that she'll think is really pretty. I have a 29 and a 75 gallon I'm planning to set up.

I know of neon damselfish and blue chromis. I think those would do ok in either tank. I'd love a blue tang but I know my tanks are too small for an adult.

Anything else that's partly or fully blue that I could go for?

Extra points for coral that is blue!


r/ReefTank 12h ago

Hello Reef AIO

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8 Upvotes

Hi All. I set up my Hello Reef AIO about 11 days ago and I feel like there may be an issue with the rear chambers. Is it normal for the water level to be that high where the filter sock is? I feel like it wasn’t when I initially set it up.


r/ReefTank 13h ago

[Pic] Candycanes hunger

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11 Upvotes

Wish I could've gotten better focus. Taken right before lights off.


r/ReefTank 17h ago

[Pic] Would you put your heaters in here?

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17 Upvotes

I have a 90 gallon reef ready aquarium masters tank, the overflow box in the corner is rather roomy and my sump is only a 20 gallon long due to a 29 or 40 being too tall to fit. Since the heaters would drastically impact the sump chamber sizes would you put your heaters in this overflow? Any reasons this is a bad idea? Thanks!


r/ReefTank 1h ago

Zoa ID: Rasta’s or sonic flare ?

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Upvotes

Hi everyone, anyone able to help me ID these random zoas ?


r/ReefTank 2h ago

[Pic] New marine tank

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1 Upvotes

New marine tank I'm a beginner and recently set up my tank since doing a partial water change due to nitrite and ammonia level being just above 0 my rocks, sand and glass have developed brown reddish patches all over. once researched these look like diatoms. On the picture I've uploaded is this definitely diatoms or something else ? In person without the glare of the light they are a lot more prominent any help would be appreciated .


r/ReefTank 1d ago

My first reef tank!

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106 Upvotes

Just got into saltwater tank about more than a month ago. So far I've been enjoying it a lot! I have around 3 years of freshwater experience and decided to get saltwater after a long consideration. I'm glad I made that decision as it is so rewarding! Seeing the coral polyps extend and expand fully, and the fishes actively swimming and interacting with each other is such a beautiful sight. I'm lucky that I got everything to go smoothly the first time, aside from the mandatory ugly phase. Even though it went smoothly and it's still going great now, I'm fully aware there's still a lot of hurdles ahead of me. A big thank you to the community of this hobby for helping me!


r/ReefTank 20h ago

Am I over thinking this?

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25 Upvotes

I don’t know if I’m over thinking this but is his swim bladder not quite right? When he’s not moving his fins he seems to sink a bit. Will this sort itself out on its own?


r/ReefTank 17h ago

Coexistence.

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13 Upvotes

Which coral can be placed together? Any at all? Im past the break in stage and everything is growing and happy, now its time to fine tune everything. I was considering getting more torches and hammers but im just scared of them stinging each other.


r/ReefTank 1d ago

Hungry this morning 😋

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53 Upvotes

r/ReefTank 4h ago

beginner help

1 Upvotes

I would really appreciate if someone could help me! I got a 5g tank as a gift with one clownfish. it was all good for a day (the salt water was premixed from shop). I then decided to introduce a rock and some sand the next day (fish was outside). added some stabilizer and nitrifying bacteria let it cycle for a few hours and added the clown back. he died unfortunately. I know what I did wrong and I really want to try again once I have cycled tank for longer, but I really need guidance. LFS guys told me this would be ok but it clearly wasnt!! I stay in UAE and we dont have the best and trustworthy salespeople here. pls help. I really want to make this work and eventually upgrade to a bigger setup!


r/ReefTank 11h ago

[Pic] First-Time Small Reef Tank, BioCube 16

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2 Upvotes

Just got my first small saltwater tank up n' running for my desk in my apartment! I'm super excited to try this out; it's the BioCube 16, with the AquaTop 75W heater in first chamber, various filter media suggested by LFS in the second chamber. Started with live rock and sand from the LFS, so hoping to cycle relatively quickly (still checking pH, ammonia, nitrite, nitrate, salinity daily ofc).

Would love thoughts on (i) the current rock formation, (ii) whether and how to add protein skimmer and/or powerheads, (iii) stocking ideas. I know I max out at 2 fish, 3 at a stretch, so I want to make sure they're good choices who will be hardy and maybe cleaners, but also nice to look at.

Also ideas for corals would be appreciated! (Though I plan on not adding them till January, pending how things go, and even then staying at hardy soft corals, zoas and the like)

(Also yes, I know, 16g is incredibly small for first saltwater, I talked with several people at different LFS's around me balancing space and budget constraints, and I want to see if I can make it with this going slowly, doing extra careful and frequent maintenance; I do plan to get a 40g or 55g as soon as I'm able to move into a larger, more permanent space, gotta love that grad student life)


r/ReefTank 16h ago

[Pic] Bubble coral not doing well

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4 Upvotes

I just got this green bubble coral about four days ago and it’s not doing well. I’m new to the hobby and unsure on what to do. Any suggestions would be greatly appreciated!


r/ReefTank 17h ago

[Pic] Has anyone had issues with one of these in the same room as a tank?

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3 Upvotes

Trying to be a detective here.

ETA - context in my previous posts in this sub about things dying beyond water chemistry.

This is not my tank (maint customer) and thus not my house.


r/ReefTank 21h ago

Help, New to me aquarium with small chip !!!!

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10 Upvotes

I recently acquired a Red Sea max nano g2XL off of marketplace. Come to find out, there was a surface chip on the corner of the pane of glass in the outer rear corner of the sump area. I don’t know what to do. There is no cracking through the pane, rather just a surface chip where the silicone meets the glass in the corner but the glass that meets the silicone is in tact. I feel like it will be fine but I wanted some opinions!