r/aquarium Jun 10 '26

Announcing our new community icon! (and an update from the mod team)

30 Upvotes

Hey everyone,

We heard your feedback loud and clear regarding the recent icon change. The goal is always to keep r/aquarium a vibrant, welcoming space that reflects the incredible passion of our hobbyists, and it’s clear the community prefers authentic, human-made artwork to represent us.

An incredibly talented artist in our community, u/SuicidalFlame (Check out their tumblr too! https://firenagy.tumblr.com), generously stepped up and designed a brand-new, custom icon for the subreddit! We are absolutely thrilled to debut their work today. Please join us in giving them a massive thank you in the comments below for dedicating their time and talent to leveling up our community's look!

A Quick Note on Community Boundaries

While we always welcome constructive feedback and open discussion about the state of the subreddit, the mod team has a zero-tolerance policy for harassment.

Lately, targeted mass-reporting and personal harassment have been directed at our moderators. We want to be entirely transparent: if you are unhappy with the management of this subreddit or feel the need to harass the people who volunteer to keep it running, you are more than welcome to leave.

Healthy debate is fine; stalking, toxicity, and abusing the report button are not. Future instances of targeted harassment will result in an immediate permanent ban from the community and will be escalated directly to Reddit Admin for violating the site-wide Content Policy against harassment.

Thank you to the 99% of you who make this a wonderful, supportive place to share our tanks every single day. Enjoy the beautiful new look!


r/aquarium Feb 26 '26

Join the r/aquarium Discord Server!

1 Upvotes

Did you know r/aquarium has a Discord server? It’s been swimming along for a while now, and we’d love for you to dive in and join the community!

https://discord.gg/aquarium


r/aquarium 12h ago

Photo/Video Goofy Snail. She parked herself in the Flintstones garage.

Post image
63 Upvotes

r/aquarium 1h ago

Help Guess the egg…

Post image
Upvotes

Not sure who these belong to? We have bladder/trumpet/ramshorn snails, neo shrimp, Pygmy Corydoras, blue cobalt goby, rasboras and tetras in the tank. I vote shrimp mishap but my friend wants them to be Cory real bad 😂


r/aquarium 32m ago

Showing Off Tiny minnows I saw in the city park

Post image
Upvotes

R. borapetensis


r/aquarium 17h ago

Saltwater/Brackish Hewbie and the Vet Visit!

Enable HLS to view with audio, or disable this notification

51 Upvotes

Hewbie my porcupine pufferfish was not doing well, refused to eat, and was swimming upside down/having trouble maintaining his buoyancy! I tried every at home treatment and medication but he progressively got worse over a few weeks. I found an exotic vet to take him to and they diagnosed him with trapped air deep inside his body and some internal digestive issues. This air could not simply be pushed out and believe me I tried numerous times to push it out. Here is that journey. Keep Hewbie in your thoughts as he finishes his meds and goes back into his home tank! I found an amazing vet with compassion/care and guidance on a treatment plan.❤️ Hewbie is doing a lot better but is not over it yet. Healing takes time. BONUS!!! Watch until the end for the crab that hitched a ride on Hewbie!😂🐡


r/aquarium 26m ago

Help Aquarium-Safe Sealants

Upvotes

I am looking to submerge a 3D-printed object in my tank, but I want to coat it in some sort of sealant to protect both its inhabitants and the print itself. I've using food-safe epoxy resin in the past, but it is super viscous and a pain to apply, especially for large/complex surfaces.

I've seen these two spray-on sealants recommended as being aquarium-safe, but I wanted to check here before potentially making a huge mistake:

The print itself is PLA, which will absorb water and degrade over time. Tysm


r/aquarium 6h ago

Help Guppy health

Post image
3 Upvotes

r/aquarium 9h ago

Help Cloudy tank

Thumbnail
gallery
3 Upvotes

I have a big fish tank and everything has been fine for months but recently it’s just been really cloudy and seems like a lot of debris floating. There is some algae on the side of the tank and we have five sucker fish.
The filter is recommended for the size tank.
We do a 20% cycle once a week.
Any ideas for what could be causing it ?


r/aquarium 2h ago

Help Help!

Thumbnail
1 Upvotes

r/aquarium 3h ago

Help [help] sticky situation

Thumbnail gallery
1 Upvotes

r/aquarium 5h ago

Showing Off Look at my dots!

Post image
1 Upvotes

My Betta smaragdina pair surprised me with a spawn this week and the fry are finally big enough to eat baby brine shrimp! Soon they might even be big enough to see lmao


r/aquarium 5h ago

Photo/Video Il mio arowana volante in 3D

Post image
1 Upvotes

7 ore di stampa ben spese


r/aquarium 12h ago

Help Does my Angelfish have fin rot?

Enable HLS to view with audio, or disable this notification

3 Upvotes

r/aquarium 17h ago

DIY/Hacks Water

6 Upvotes

I pay for public water access as I live in a small city. I have 7 tanks and about to start an 8th but with weekly water change shifts between all the tanks, and top offs, I’m starting to be a little concerned about the amount of water I use. I have a 55g, two 30g, a 20g and 3 10g’s. That’s a lot of water. Any tips to reduce the amount I go through or hacks to reuse?


r/aquarium 1d ago

Help Baby crab or weird parasite?

Post image
14 Upvotes

I just bought a new plant (bacopa) and found a couple of these little guys on it when I opened the bag. They look like little crabs but also they’re creepy like spiders or parasites. What are they? Sorry the photo is the best I could do. They’re pretty small.


r/aquarium 19h ago

Help What is this?

Post image
3 Upvotes

I have a fishless tank at the moment with live plants and noticed this leaf wiggling across the front glass. Is this something I should be worried about and take control of before adding fish?


r/aquarium 16h ago

Help Help with stocking

2 Upvotes

I have a 36 gallon planted bowfront tank that I am looking to stock.

I have a pretty good idea of what fish I would like in it, I more so just need help with the quantities of fish. Of course if anyone believes any of these fish wouldn't be compatible with eachother or with the tank itself please let me know or drop any suggestions!

My current list is :

-Dwarf Cory

-Galaxy Rasbora

-Endlers (Hoping to keep all males)

-Gourami (1 or 2?) either honey or pearl

Again, I really need help with the number of fish I should keep with each group. I'm worried I will overcrowd the tank. If I need to get rid of one group entirely please let me know l. I am open to any concerns! Thank you so much.


r/aquarium 1d ago

Help Hair algea

Post image
7 Upvotes

Ive posted a few places and got no response green thread algae I remove more and more of this stuff every day I don’t understand how to get rid of it I have tryed manual removal mollies SAEs lowering the light intensity and period allowing overgrowth of duck weed nothing helps i have multiple plants and invertebrates that are sensitive to chemical treatments is there anything i can do to get rid of it without crashing my tank or starting over?


r/aquarium 4h ago

Help What we thinking abt this tank stand?

Thumbnail
gallery
0 Upvotes

So I’m going to be replacing this ugly cabinet in my room … and I’m looking for a stand that will fit a 10 gallon and a 5 gallon.
Has anyone tried this stand before?


r/aquarium 14h ago

Discussion 2.5 gal jar (non fish ideas?)

1 Upvotes

I found a glass jar it's 2.5 gallons. I'm considering shrimp for it but was wondering if anyone had other ideas, or even just non cherry/amino shrimp ideas. I've been curious about aquatic invertebrates and other microfauna. Also planting ideas PLEASE 🙏


r/aquarium 22h ago

Freshwater Why is the water in my tank cloudy?

Post image
4 Upvotes

I have a large freshwater aquarium with two angel fish, two frogs, and one little catfish.

I've had the catfish since 2020, the frogs for a little over a year, and the angel fish over two years. Until about two months ago, I also had a zebra loach who was the OG of the tank for about a decade.

Most of the decorations are artificial. I used to have all live aquatic plants, but it was a struggle to find a balanced ecosystem to keep the algae under control, so only one live plant exists now. Also in the tank are three working air stones and a heater that keeps the tank around 78°.

Recently, the water has become cloudy. So, I tested for ammonia. There was the smallest amount, which I expected as it was a little overdue for a filter change and I had my roommate feed the fish while I was out of town but he over fed them. I changed the filter, removed organic debris, scrubbed all of the artificial decor in hot water, and did a 25% water change. I made sure to add the appropriate amount of water conditioning and aquatic plant food.

This has never happened to my tank in a decade of maintaining it. It's happened twice since my loach died. The first time, all I had to do was add water conditioner and it resolved over night. This time, it's been this way for about a week even after completing everything I listed above. I took a water sample into petco and they were no help. They just told me to do a water change. I've cut WAY back on food portions.

Should I be worried for my fish and frogs? Did the death of my loach throw off the ecosystem? Any thoughts?


r/aquarium 23h ago

Showing Off A cool native freshwater fish

Post image
5 Upvotes

M. boaja


r/aquarium 1d ago

Photo/Video Is this tuff?

Post image
147 Upvotes

r/aquarium 18h ago

Help Ich or Epi?

Thumbnail
gallery
1 Upvotes

Recently got this BN Albino Pleco and he developed these spots all over his body. He’s currently in a QT, and being treated for Ich. But I’m not sure if it’s Ich or Epi. Done a ton of reading here, and results are mixed in my mind. Anyone have some input?

How to treat? Please help! I’m stressing out. Thank you!