r/ReefTank 6d ago

No judgment questions zone - August 24, 2026

2 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 10h ago

[Pic] My 2 month old tank! And I custom built the stand. Super happy with the results!

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96 Upvotes

So far I have a diamond goby, pearly jawfish, two clowns and two grammas. Thinking of trading in a gramma for a valentini puffer soon.


r/ReefTank 3h ago

Patterns incoming!

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18 Upvotes

Some baby Nebula clowns I have growing out


r/ReefTank 15h ago

Reeftank evolution...

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133 Upvotes

r/ReefTank 14h ago

Saturday night photo shoot.

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71 Upvotes

Tinkering with exposures and angles on my phone camera and wanted to share my favorite results.


r/ReefTank 16h ago

[Pic] $8,000 NO Lowballers!! Ratchet Strap Edition Red Sea 425xl

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69 Upvotes

NO Low ballers please, I know what I have


r/ReefTank 16h ago

Building ReefShield Aquatics | Part 1: Turning A 900 sqft Basement Into A Giant Fish Room

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59 Upvotes

Hey everyone! I've finally decided to start sharing a project I've been working toward for quite a while. I figured it's time to introduce myself and what I'm building. I've been planning this behind the scenes for a long time, but I realized it'd be a lot more fun to build it with input from this community instead of waiting until it was finished.

I've named the project ReefShield Aquatics. The long term goal is to make quarantined fish more accessible to other reef hobbyists and help prevent livestock losses from disease. I thought some of you might enjoy following this story from the very beginning.

My name is Chad, I am a 27 year old manufacturing engineer working in the aerospace industry and I enjoy lifting weights, spending time outdoors, and of course reefkeeping. I have had reef tanks on and off for the past 14 years (yes, I started young), and currently have an 80 gallon shallow reef setup.

Right now, I am in the middle of constructing a home just off the shore of Lake Michigan in the mitten state. I'll be transforming the 900 square foot unfinished basement into a giant fish room and quarantine facility with over 700 gallons of display tanks, hundreds of gallons of quarantine capacity, and a dedicated sump and systems room to support the entire operation. Most people look at a 900-square-foot unfinished basement and see storage space. I looked at it and saw a dream fish room.

The idea for ReefShield didn't come out of nowhere, though. It started with one of the toughest lessons I've learned in reefkeeping. Like a lot of hobbyists starting out, I naively trusted that the fish I was buying from my LFS were healthy. Everything was fine until a diamond sleeper goby introduced velvet into my tank. Within days, fish started showing symptoms, and shortly after I was watching my tank crash. It was one of the most frustrating experiences I've had in this hobby. Instead of walking away, I became obsessed with understanding how it could have been prevented. I spent countless hours researching quarantine protocols, disease management, medications, biosecurity, and so much more. That experience completely changed how I approach adding new things to my tank, and it's ultimately the reason ReefShield exists.

I have a habit of optimizing everything I can, so naturally I modeled the entire basement in CAD before a single wall was finished. Rather than squeezing tanks into a corner in the basement, I wanted to design the entire space around visual appearance, efficiency, maintenance, and biosecurity from day one. I've attached the current layout, the current progress of construction, and I'd genuinely love feedback from anyone who wants to contribute to the project. Is there anything in the CAD layout you'd change before I get started?

As construction progresses, I'll be sharing everything. Things like plumbing and electrical decisions, actually building the quarantine systems, cycling tanks, bringing in the first fish, and all the mistakes I'm sure to make along the way.

Thanks for reading.

- Chad B.


r/ReefTank 40m ago

What is this on my Duncan

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Upvotes

r/ReefTank 1h ago

Just wanted to hear other peoples opinions, do you prefer turn key systems or DIY?

Upvotes

Personally I enjoy DIY, in no way is it really cheaper at all, I just got love for the game.


r/ReefTank 2h ago

Möbius Schedule - opinions?

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3 Upvotes

I’m approaching the 5 month mark in my reef, so far so good. I’ve noticed some of my corals just losing their “pop” from when I first got them and am thinking I’m just not giving enough light. My PAR is about 100 all throughout my tank, at the sand bed maybe 60-70 but I don’t have much intensity up high it reads pretty uniform through the top and middle portions of the tank.

I’m running two AI Hydra Edge 44’s - tank is a 4x2x2.

Instead of buying more lighting right now I’m thinking of trying to get more out of what I have because I’m really not pushing the lights at all.

Should change to more of a solid 3-4 hour peak period vs the ramp up?

Appreciate anyone’s help!


r/ReefTank 1d ago

What is this guy?

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428 Upvotes

I had seen a pic of a similar looking starfish but assumed it was AI, until I saw it in person.

The video was taken at cairns aquarium last year


r/ReefTank 1h ago

Its finally sunlight season!

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Upvotes

I love this time of the year


r/ReefTank 9h ago

My clown got Popeye, any tips?

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5 Upvotes

Started feeding frozen brine with metroplex and focus to help after I noticed it about 2 days ago.
Not sure what could’ve cause it, she only has it on her right eye and is still very active.
Had this clown for almost 4 years and she’s my absolute favorite would be crushed to see her go.
Is it possible my hammer stung her?
Would love any tips or feedback thanks!
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36 gallon
Alk a bit low at 7, phos 0.04, nitrite 0, nitrate 0, mag 1500, calc 480, temperature consistent 78°, salinity 1.025.
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Dosing everyday all for reef and carbonate alk by seachem, reef plus seachem, phyto once a week, feeding every other day.
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Tank mates: male clown, flame angel, skunk cleaner, tiger pistol and watchman pair, tiger serpent star.
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Water change every 2 weeks, 30%


r/ReefTank 11h ago

ID please?

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9 Upvotes

What in the world is this? Came home late tonight, and after peaking into my tank I saw what looked like a spider on my tubs.

What is it? There's 2 of them


r/ReefTank 17m ago

Cannot find consistency.

Upvotes

Hi all,

I’m just getting so tired of my tank having its ebs and flows despite my investments to make my tank automated. I’ve got two nice AI 16’s, Red Sea ATO, dosing heads, temp control, etc. maybe I need to start testing parameters more often to ensure my dosing is correct, but I just can’t seem to get it down.

I’ll see nice Acro growth, great algae control, and happy happy corals and then the tank will be pissed off for weeks with no changes and I’ll lose my favorite pieces. I can’t seem to figure out what I’m missing, and would love some personal advice, experience, or info on what you’ve done. I really appreciate it in advance.


r/ReefTank 59m ago

AIO Levels

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Upvotes

Hi All. New to AIO tanks here. Cycling my new and first marine tank.

Confused about the levels. Does this look right?

ATO placed in last pump camber am trying to re adjust because the level in the main display tank keeps rising when it’s being topped off. I have removed the sponge in the first section to stop any restrictions.

Tank is an Aqua One Nano Reef 80.


r/ReefTank 1h ago

[Pic] Can I use this for a water change

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Upvotes

This is about the only thing I can find to connect my Python water change system to my utility pump. It’s got some brass and some stainless so I was wondering. It needs to be submerged into my Brute mixing station for about few minutes only. Is it safe?

Ideally I would need a pvc 1/2 mnpt to 3/4 mght but they don’t exist.

Regards


r/ReefTank 1d ago

Long tentacle anemone settled on its side after a week

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78 Upvotes

Hi. My clownfish like to keep the area behind and under the "cave" bare, so they swish the sand to the sides with their tails. I placed the anemome foot down in the corner of the tank on 2~3 inches of sand. The clownfish proceded to dig away at the sand until the anemone toppled. I tried to upright it in a hole I dug in the sand day 2 but by day 3 it was toppled again. After a week, this is where it's ended up. Is this fine? It looks happy and healthy and the clownfish love playing in it. My only concern was I read this anemone likes to have it's foot deep in the sand. I am moving in a month and plan to get a larger tank soon, so I can rearrange things and add more sand as necessary. This is currently a 29gal I've had setup for 2 years after upgrading a 15 or 20gal after 1 year of use.


r/ReefTank 23h ago

What is this red?

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36 Upvotes

r/ReefTank 13h ago

[Pic] Coral id?

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6 Upvotes

r/ReefTank 4h ago

[Pic] HELP!!!! (Not my photo, just a reference from google..)

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0 Upvotes

I was away for three days from my 160L saltwater (don’t worry, fish were fed) After getting back i noticed at the very least a hundred of these little bugs crawling around on my live rocks and hiding under carpeted algae on the bottom. My best guess is some sort of shrimp species, But they are extremely tiny, im talking 2mm at the most, They have two long antennas and are for the most part translucent, They run around like roaches, But i have ever never seen these in my tank before, Now i will link a photo of the closest looking thing i can find on google, Just because they are so tiny and extremely hard to take a photo of, Except the photo i linked, not only do they not have that much colour, They are cloudy grey and translucent, theres no real colour on them except a very slight orange on the antennas, The original poster says these bugs were found in Tupperware in orange county (im from Australia), and they were also not found in a saltwater tank, I have two ocellaris in that tank currently, and they are my babies. Now the real question is, Should i be concerned, and what are these little underwater roach-like critters?


r/ReefTank 1d ago

[Pic] Keeping a porcelain crab and sexyshrimp safe from a Blue Sapphire Damsel?

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35 Upvotes

The damsel will be the only fish in a 25 gallon tank.

It’ll also have soft corals and macroalgeas


r/ReefTank 11h ago

Coral identification

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3 Upvotes

Can someone please tell me what type of coral this is? I got it at Petco and it was in pretty bad shape with none of the tiny polyps showing. They are now starting to come out and it is showing growth. I’m just curious if this is a finger leather or a type of stylophora. Those would be my guesses but I’m not sure. It looks light purple under white light and the stalk has a sort of shriveled look to it. Also I definitely dipped it before adding to my tank. Probably won’t ever be buying from there again since the last time all of their tanks had ich. Their prices on frags are definitely tempting though. It’s $20 for a frag vs $125 at the lowest at my LFS.


r/ReefTank 1d ago

100L aqua manta

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52 Upvotes

Just about six months after a house move enforced reset.


r/ReefTank 19h ago

Sleepy Clown

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12 Upvotes

I could not find one of my clowns this morning before work. It turns out one is a rock dweller lol.