r/ReefTank • • 5d ago

No judgment questions zone - October 12, 2026

0 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 • • 2h ago

[Pic] I’ve successfully kept a mandarin for a year. I feel I have done well in my reefing experience now

Post image
53 Upvotes

r/ReefTank • • 3h ago

Gooseneck barnacles feeding

24 Upvotes

They seem to be doing well. They pull in food as it passes by. Haven’t noticed them reject anything or spit anything out. Even the small baby ones are seemingly doing good. Time will tell though.


r/ReefTank • • 1h ago

[Pic] IM100EXT - 1 year progress

Post image
• Upvotes

r/ReefTank • • 2h ago

Critter ID, what is this?

13 Upvotes

Just noticed this, what is it?


r/ReefTank • • 1h ago

I got a Clown with a ghost face on it

Thumbnail
gallery
• Upvotes

Is it rare or common? Paid 15$ for this ocellaris.


r/ReefTank • • 8h ago

Nano tank especial

Thumbnail
gallery
25 Upvotes

20 gallon nano with a 6 gal side tank ... I let this thing go into the trash heap the last few years but now I've been back on top of it and it's crazy that all the corals survived the obsurd hair and bubble algae outbreak, and have grown back this much already .. some of the SPS were the size of a pinky nail under the hair algae


r/ReefTank • • 5h ago

Wait for it.

13 Upvotes

I didn't know they had so many.


r/ReefTank • • 10h ago

Any of y'all get tats of your creatures?

Thumbnail
gallery
22 Upvotes

This is my pistol shrimp Roland, my little gunslinger


r/ReefTank • • 6h ago

Quick critters..

8 Upvotes

What in the world is snatching food from these little holes?


r/ReefTank • • 1h ago

DFW expo pickups. Knicks and a dragon soul i believe. Knicks is almost branching into 4 heads. $130 for both.

Thumbnail
gallery
• Upvotes

r/ReefTank • • 9h ago

[Pic] This hobby tests me

Post image
14 Upvotes

Lost 80% of my chalice overnight. I know it's worth it, but damn... Just when my hammers were getting as big as the one I lost to brown jelly, this happens.

Quarantine bucket, peroxide treatment, scrubbed off the jelly. Not easy to frag the encrusted part so I let it be. An old frag from this same colony is growing on a rock in the corner of the tank, healthy and untouched.


r/ReefTank • • 1h ago

[Pic] Why does my chromis look bonked

Post image
• Upvotes

It looks like he got bonked on the head… why?? Ive had him for 2 months and he’s always looked like this lol


r/ReefTank • • 1d ago

[Pic] Nem Cube

Post image
167 Upvotes

r/ReefTank • • 3h ago

help: got this poletti mushroom for 15 bucks

Thumbnail
gallery
3 Upvotes

it was attached to a frag and now it just detached itself from the frag.

i’m dropped it in the low flow low light area of my tank. is this good? or should i move it?


r/ReefTank • • 10h ago

Bought a bubble coral in bad shape today and this one came with it

11 Upvotes

Anyone know what it is?


r/ReefTank • • 5h ago

Advice on how to make tank look better?

5 Upvotes

I apologize for the bad video work, tried to capture best I could.
First ever salt water tank, 15 g. have some new corals and stuff but doesn’t feel complete or right imo
Anything I should add, change, or keep? Any Help appreciated


r/ReefTank • • 1h ago

Sponge?

Thumbnail
gallery
• Upvotes

I think I have some sponges bothering my coral. Should I remove them ?


r/ReefTank • • 3h ago

Aiptasia?

2 Upvotes

r/ReefTank • • 6h ago

[Pic] Dino or canopy?

Post image
3 Upvotes

Ive been struggling with this for the last several weeks. Nitrates were 8 and phos under .1 when I last tested. Really making me consider tearing down the aquarium


r/ReefTank • • 5h ago

My first saltwater setup, been a learning curve but going well

3 Upvotes

Around 7-8 months old at this point I'd say, first corals went in less than a month ago. Slowly and patiently seeing how they do and then getting more if the answer is well!


r/ReefTank • • 10h ago

[Pic] Is this cyano?

Post image
5 Upvotes

I’ve treated with chemi-clean on two separate occasions to no avail. An extended seemed to eradicate it but a few days after the lights came back on it was back and spreading rapidly. Any advice?


r/ReefTank • • 18h ago

[Pic] Berghia nudibranch eating Aiptasia

Post image
24 Upvotes

r/ReefTank • • 2h ago

[Video] New 'Golden Tree' Coral Is So Strange It Needed Its Own Family on The Tree of Life

Thumbnail
youtube.com
1 Upvotes

r/ReefTank • • 5h ago

[Pic] Anyone know any good and affordable PAR meters?

Post image
2 Upvotes

All the par meters I’ve seen are in the 300$+ range and I’m looking for something sub 150 if possible but I still want something that will last and is somewhat accurate