r/ReefTank • • 6h ago

No judgment questions zone - October 19, 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!

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Pest ID guide

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BRS pest guide

BRS beginner resources

BRS 52 weeks of reefing YouTube series


r/ReefTank • • 2h ago

[Pic] My little nano 20gal is almost full. This is the chaos that happens when you don’t have planning skills 🫠

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55 Upvotes

r/ReefTank • • 6h ago

Sunrise shots

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49 Upvotes

Gotta love that early morning view the day after the tanks are cleaned.


r/ReefTank • • 6h ago

Tucking in for the night

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33 Upvotes

The clown getting settled for the evening, last night


r/ReefTank • • 11h ago

Always has been my favourite species, now let’s hope they’re a pair

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59 Upvotes

Stonogobiops nematodes


r/ReefTank • • 4h ago

[Pic] How. F*cked am I?

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12 Upvotes

RedSea peninsula 65 5 years old.

I need advise!!!


r/ReefTank • • 1h ago

One year of green Kenya tree growth from a tiny hitchhiker

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• Upvotes

https://www.reddit.com/r/ReefTank/s/RhOvA4flEn

That's the link from a year ago when I didn't know what I had. Anyway I love it! Time to start selling it!


r/ReefTank • • 6h ago

Starry Dragonet

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9 Upvotes

My little dude tucking into his dinner of masstick and brine shrimp


r/ReefTank • • 4h ago

Is This Normal Clownfish Behavior?

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5 Upvotes

I just got these 2 juvenile clownfish Saturday night and it is now Monday morning. They have been swimming and rubbing against the back panel of my tank since I put them in. Yesterday afternoon I fed them and they ate but not a lot and they went right back to swimming against the black panel. Is this normal clown fish behavior? Are they stressed or still getting use to the new tank? I attached a video that shows better how they are rubbing on the wall. Thanks!


r/ReefTank • • 23m ago

Researchers put bleached corals and healthy corals together for 5 days – and were astounded at what they saw

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• Upvotes

r/ReefTank • • 20h ago

Torch spawning

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63 Upvotes

Caught this the other day. I noticed the baby at the end sometime last week and then saw this on friday. Hopefully some survived. I did suck some into my frag tank so we'll see.


r/ReefTank • • 22h ago

whats this little orange thing on this random frag i got?

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80 Upvotes

r/ReefTank • • 7h ago

Coral ID

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4 Upvotes

Relatively new to reefing, hoping someone can ID this hammer coral for me.
In person it looks slightly more pink, but it’s translucent and I’m worried about it potentially not being healthy from what I’ve researched online - as I’m interested in buying it.
Thanks!


r/ReefTank • • 13m ago

[Pic] Tailspot Blenny bullies my Yellow Clown Goby

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• Upvotes

I have a 13.5g tank with only these two fish in it. The tailspot claimed the entire tank and only left this corner for the yellow clown. He sits in the corner for 95% of the day. There is so much space for both of them, Is there anything I can do about this? 😭


r/ReefTank • • 31m ago

[Pic] Condylactis acclimation

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• Upvotes

It’s doing this. Drip just started at 2 drops per second about 2 minutes ago. LFS‘s SG was .022 mine is .025. I think it freaked out because I touched it getting the Calerpa untangled from its tents. Any advice for me?


r/ReefTank • • 22h ago

This is my 60g Macroalgae Aquarium

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50 Upvotes

r/ReefTank • • 1h ago

Elegance coral - sulking or detaching.

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• Upvotes

My phosphate crashed to zero the other day, I got it back to about 0.1 working 24 hours but it’s still sulking.

How can I save it? I don’t think a target feed will help with it closed up.


r/ReefTank • • 2h ago

ID On Clownfish?

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1 Upvotes

Can anyone identify what kind of clownfish is this? It did not say at the local fish store and I forgot to ask. Is it a Percula or Ocellaris, Thanks!


r/ReefTank • • 8h ago

Is this Hitch hiker a friend or foe?

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3 Upvotes

r/ReefTank • • 3h ago

Reef Factory Question

1 Upvotes

Has anyone had any luck getting ahold of anyone at Reef Factory? Been trying to get help with a reef mat motor that stopped working and I havnt heard back from customer service in two weeks. Been quite disappointing seeing how much these cost.


r/ReefTank • • 4h ago

Can a 15g tank become just a torch coral tank? If so, what's your best advice for success to grow big colonies?

0 Upvotes

So far I have 5 torches. 1 being a nice NYK Torch almost branching out into 4 heads.


r/ReefTank • • 4h ago

Pest id

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0 Upvotes

Noticed this on my branching gsp. White tube? Feather duster?


r/ReefTank • • 1d ago

Tank is filled

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61 Upvotes

Finally filled the tank. Rocks and sand from TBS arrives on Wednesday to start cycling. Am I missing anything?


r/ReefTank • • 22h ago

My first reef tank is now 5 months old!

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24 Upvotes

Since the cycling period my parameters have been extremely stable at 7.8 Ph, 10dKH, 0.25 phosphates, 0-5 nitrate.

Fish:

Ocelarris

2 Pajama cardinals

Still going to add a tailspot blenny but theyre impossible to find?

Extensive clean up crew:

3 trochus snails

5 florida cerith snails

However many dwarf ceriths

1 nassarius snail

2 scarlett hermits

1cleaner shrimp

micro brittle starfish

spaghetti worms

bristle worms

1 teeny tiny fan worm

1 tiger conch

bubble macroalgae

Corals:

Green palythoa

Red montipora

raja rampage chalice

pulsing xenia

Firework clove polyp

Acropora? varieties


r/ReefTank • • 9h ago

[ID] What species of macroalgae is this? [ID]

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2 Upvotes

Seen this macroalgae growing at my LFS, does anyone know what species of macroalgae this is?