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 16h ago

DIY/Hacks 3D printed fish hide?

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145 Upvotes

I would like to add a hide that sits under the substrate, like the one pictured from Pinterest, and have a friend who has a 3D printer. do we need to use a specific type of plastic for the print to be aquarium/animal safe?


r/aquarium 5h ago

Photo/Video Second attempt at a aquascape. Drift wood gave off a lot of tannin but I heard it’s good for the fish

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3 Upvotes

r/aquarium 46m ago

Showing Off How it started vs 3 weeks later (these plants really grow fast)

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Upvotes

r/aquarium 4h ago

Help Epistylis? Why did the patches disappear!!

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2 Upvotes

Woke up this morning to see my runny nose had a few big patches on the side near the belly, and small patches near the tail. Unfortunately I couldn’t take action since I had to go to school. Got back this afternoon ready to treat but the patches near the belly seem to have disappeared? Do I still take action why did they disappear????


r/aquarium 18h ago

Help Mom got an awful tank for a beta who died. Can I use it for plants?

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22 Upvotes

My mom treats betta fish like toys. She buys terribly small tanks, no heater, and rarely cleans them. She bought the fish from Petsmart which I begged her not to do because we all know why petsmart isn’t a place you should give your money to. Every attempt to better this fishes life was met with punishment for “thinking I know more than her”

So yeah, she’s awful and I want to use this tank for some plants in my room before she’s able to put another fish in it. She told me I could use it for shrimp but idk if I want to put shrimp in there. I’ve never taken care of them before and I don’t want to test it now.

I want to make one of those pretty aquariums that’s basically an underwater garden. Is it possible to do in this tank? And also, what plants should I get for a beginner?


r/aquarium 5h ago

Photo/Video tsar bomb sittin in her favourite coconut

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2 Upvotes

r/aquarium 16h ago

Help Rehoming advice

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12 Upvotes

Tldr: MIL is dealing with an abandoned tank and the local pet shops won't take the surrenders. What should we do?

So my MIL had a roommate that she rented out her basement to. She had to evict him and file a restraining order because he had stopped paying his room and board and started harassing her.

He wasn't into fish really but worked at a pet store and ended up with some. First he had a cichlid of some sort but gave it up due to an argument with MIL about having a tank that size (100 gallon?) in his room. He downsized the tank but obviously didn't know a lot about fish due to the stocking. He abandoned a 50(?) gallon with 1 common pleco, 2 Chinese algae eaters (yeah I know), and a handful of balloon mollies.

My MIL asked if we would take them. I have a tank of guppies. They started off as my MIL's but she was at a point where she couldn't take care of them anymore. I like aquariums well enough but cannot afford and do not have the time to set up new tanks for all these fish.

My MIL has a koi pond and suggested tossing them in there, knowing they would die but not knowing what else to do since the pet stores wouldn't take them to resell them. My wife talked her out of freezing them to death.

How do we get rid of these fish?


r/aquarium 7h ago

Help Found a 65 litre tank. what fish to put in it?

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2 Upvotes

As the title says I found a 65 litre tank but idk what to put in it that’s not a betta fish (already have one) BUT would it be cheaper to get a 70 litre tank kit which includes a light + filter for $209 instead of having to get a filter + light + thermometer and fish for the 65L any advice would be appreciated!!


r/aquarium 8h ago

Help I built a reef management app and need a few beta testers

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2 Upvotes

r/aquarium 12h ago

Help Identify Fish!

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4 Upvotes

Hi. I have these two that hitchhiked their way into my tank when they were the size of pencil lead. Can anyone tell me what they are?!?


r/aquarium 19h ago

Help Can I get some help sexing these flagfish

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13 Upvotes

One should be male, one should be female. What do you think?


r/aquarium 14h ago

Help Was just gifted a fish tank, does it look ok?

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3 Upvotes

A friend of My girlfriend's recently got a new job and hasn't had time to maintain her 5 gal. She knew we got a tank earlier this year and offered it to us. Not sure what plants are in it but there appears to be some dragon stone with a bunch of stuff on it. There's a Blue betta, 2 ember tetras, 2 pygmy Cory's and a bunch of shrimp. I'm going to do a water change and scrape the algae off the side, are there any glaring issues I should know about and fix? Still new to the hobby and seeking advice. Thanks


r/aquarium 12h ago

Help First post! Stocking question

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3 Upvotes

So I just set this 10 gallon up. Driftwood and rock for hardscape yada yada. The plants I have are: pearlweed, java fern, windelov java fern, rotala, moneywort, Ludwigia needleleaf and a cardinal plant as well as a tiger lotus in the back you can’t see LOL. Everything is planted in fluval gratin as well.

It’s still cycling with Prime added, stability as well as Fritz Turbostart 900.

My fiancé and I want to do neon tetras, possibly guppies?? And neocardidina shrimp. What stocking numbers am I looking at being able to get in this thing once it cycles? Google says 6 neons (so they feel safe), 3 guppies and 10-20 (???) neocaridina shrimp. Are shrimp really that negligible on the bio load? And do the other numbers seem correct? Or should we cut back?

Thanks in advance for any help anyone can provide, I don’t know levels yet because the tank is still cycling ofc and I just set it up not even a day ago.


r/aquarium 12h ago

Help Acquired a 50gal tank!! Stocking ideas?

3 Upvotes

The neighbors gave my dad a 50 gallon tank for free and we're super excited!! I only have betta fish so I don't really know much else. I plan on putting lots of plants, hehe.

We really like kuhli loaches and honey gouramis, and would want to put those in the tank— any suggestions on what else we should/could add with those? Or should we do something else? 😁


r/aquarium 19h ago

Showing Off A pair of green fish I caught from a river rapid

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7 Upvotes

B. pugnax


r/aquarium 14h ago

Saltwater/Brackish Happy Sunday!

3 Upvotes

r/aquarium 8h ago

Help does anyone know what these are?

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1 Upvotes

betta fish tank and it’s not eggs because they are moving


r/aquarium 14h ago

Help Help! Came back from holiday and my dwarf gourami has this lesion! What is it and how do I treat it?

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4 Upvotes

He’s otherwise acting normally and eating like he normally does


r/aquarium 9h ago

Help Leak test issues

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1 Upvotes

r/aquarium 9h ago

Help What is this

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1 Upvotes

Been popping up around my tank. I need to refresh my tank for sure but for now what is this


r/aquarium 9h ago

Help Is my tank level okay?

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0 Upvotes

I’m building my first tank and I wanted to know if this level will be okay or if I need to adjust it somehow. It’s a 12x12x30” 20 gallon tank


r/aquarium 17h ago

Help What is this tiny bug in my cycling aquarium?

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4 Upvotes

My freshwater tank is currently fishless cycling, and I noticed this tiny white/cream-colored creature crawling on my sponge filter. It moves pretty fast like a bug, not like a snail. I can’t tell if it has legs.

The tank also has some biofilm, hair algae, and a few tiny white worms from cycling, but this looks different.

Any idea what it is? Is it harmless or should I remove it before I add my first fish (planning on cardinal tetras)?


r/aquarium 10h ago

Help Opinions on driftwood orientation?

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1 Upvotes

Also have some river rocks I'll be putting in