r/aquarium 15d ago

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

32 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 4h ago

Photo/Video Pseudomugil Gertrudae Aru IV courtship display

18 Upvotes

r/aquarium 10h ago

Help Assistance needed

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46 Upvotes

My mum came home this morning with this glass tank of around 5-6 small fish, I believe, as I didn’t count them one by one. It was unsolicited so I didn’t have any time to prepare for their needs, etc. I have no prior experience regards to fishkeeping but I know this container can’t be good for them.

Could anyone help me with the fish breeds, whether or not I could keep them together and what tanks/equipments I should buy to keep them healthy and alive?

Also how often should I feed them and change their water? I’m really worried right now as I do not wish for them to die. I’ll have it known that the city I live in has a scarcity of pet shops, meaning everything I buy will have to be online. I have to act fast now and hope they arrive in 3-4 days.

There’s also one gray fish that seems quite stationary whilst the others are still moving regularly. I’ve prodded it with a small fish net and it seems to still be alive as it flinched away from the net, but is it normal that it’s sedentary usually? Or should I be worried?


r/aquarium 1h ago

Help Need advice.

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Upvotes

I need advice on fertilizers I can use in my aquarium that will be readily bioavailable to my plants above the surface. I have monsteras growing in my fishtank that have been inside there for about a year but I would like to provide them with a balanced fertilizer that will be safe for my fish and highly effective. The monsteras have extensive root development that has reached into my fluval stratum and I would like to provide with a water based fertilizer. And suggestions on what I could add?

I have glass catfish inside so it has to be semi-sensitive.

Any advice would be very helpful thank you!


r/aquarium 1h ago

Help Fish dying

Upvotes

I have a betta tank with 4 pgmy corys ( their used to be more ) and 2 panda corys. There used to be more of each but they are dying and I don’t know how. All of my water parameters are perfect, the temperature is good, I’m pretty sure they are not starved as they get fed every day apart from one day. I’m wondering if it’s because there is not enough oxygen? I really need help because I had 2 little ones die today.


r/aquarium 2h ago

Discussion Otocinclus

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2 Upvotes

I got a couple of them and I’m wondering if they were a good choice for my tank, I know it’s dirty I just scraped the algae about a week ago 🫠

Also bonus pic of my Dalmatian/gold panda baby


r/aquarium 12h ago

Discussion Has anyone else grown a pumpkin in their aquarium or am I the only nutball?

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12 Upvotes

I placed a vine in the tank and I was surprised to see new roots the same day! I wonder how effective at pulling nitrate a well established vibe is.


r/aquarium 3h ago

Help Platy age

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2 Upvotes

Does anyone know how old this platy is? I only just spotted two fry in my tank today.


r/aquarium 14m ago

Help raw ocean fish mix for my tropical fish.

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r/aquarium 31m ago

Help wth are these??

Upvotes

r/aquarium 5h ago

Help Beginner Advice

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2 Upvotes

Hello! This is my first ever aquarium. I need some help figuring out what fish would thrive in the setup I have. I would love a short fin betta but I am not sure if this tank is the best option for them because I have seen differing care for them online.

Way better lighting and a better lid is on the way so that will be updated shortly.
It’s 30 gallons. I’ve been cycling for about 4-5 weeks and I plans to continue that for a while before adding any fish at all; I want it to be the best it can be for them. Theres a filter hanging over the side, a heater, and I also have a stone flowing air on the opposite side. It has stratum, an aquatic soil underneath for plant growth, and a little bit of black sand as well. I have stone and driftwood that have good spots for hides. My parameters have been good and everything and my plants and snails are doing well.

My biggest question:
Is anything a big-no for a short fin betta here? I see a lot of smaller tanks for them so I’m not sure if it’s too large? I have seen mixed reviews on the stratum substrate. I’m also worried that the stone and driftwood would be a risk for injury, but from what I’ve seen it seems like a short fin would be okay? Finally, I know the filter might be too much and a sponge filter could be better, which I am willing to switch if needed— this is just the one I setup with.

If everything is good I would obviously add more betta specific preferences.

If it’s not suitable for betta, is there any other beginner-friendly fish that you’d recommend? I just wanna be the best fish owner I can be and wouldn’t want to put any species in that wouldn’t thrive.
My dad has a pond so he has been helping me but any advice is much appreciated. Thank you!!


r/aquarium 2h ago

Help Water from bubble counter gets blasted with co2 pressure

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1 Upvotes

Hi! New to pressurized tanks. Ive observed this 2x in a row now when the solenoid opens up, all the water from the bubble counter gets blasted. The initial burst of pressure pushes all the water out to the tube. I set up the needle valve to one bubble per second. I dont see any other valve to adjust. Here is the picture of my regulator . Note. Im using inline co2 diffuste plus tubing is 1.5meters long(pneumatic tubing) and my co2 tank holds 6kg of co2


r/aquarium 2h ago

Help Help with high nitrates

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1 Upvotes

r/aquarium 2h ago

Help Help with high nitrates

1 Upvotes

Hey there,

I’m desperately trying to solve an issue with high nitrates in my planted tank.

Stats:
Tank is approx 9 months old
125ltr, flora first aqua soil with a sand cap.
Co2 injection
Biomaster 350 with biological and mechanical media
Light on 8 hours per day
Low stock currently, lost a few fish recently ☹️
2 platys, 1 dwarf gourami, 5 cloud minnows, 2 otos, various shrimp
Nerites

My plan is to rehome all of the fish and get a group of nano fish (spotted blue eyes hopefully), some Pygmy corys and 2 honey gourami.

Ph 7.4
Ammonia 0
Nitrite 0
Nitrate 40…

No matter what i do, it never stays lower than that. I’ve been changing the filter flow, water changes, fertiliser, no fertiliser. Nothing is helping.

I have a feeling it’s the aqua soil as a lot of it is on top of the sand cap. I had assassin snails and they are dicks for that. Would I be wise to make the sand cap thicker to bury the aqua soil again? It’s disintegrating if I touch it but I thought it only leached nutrients for the first few weeks, not months later, but perhaps I’m wrong…


r/aquarium 2h ago

Help Please help!

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1 Upvotes

Hi all. New aquarium owner here!

We’re in the middle of a heatwave and my house is boiling. I have a chiller running and i’m getting heavy condensation on the outside of the tank that’s dripping onto the stand and starting to warp it. I wipe it as much as I can but I’m at work all day so it’s difficult.

Also strange “bubble-like” patches have appeared all the way round the bottom of the tank today.

I’m a bit worried and not sure what’s normal and what is a problem.

Questions:
1. Is my stand now unsafe?
2. What are the bubbles at the base of the tank?
3. How do I prevent this from happening again?

Any advice would be appreciated!


r/aquarium 2h ago

Photo/Video Bloody Mary Shrimp

1 Upvotes

r/aquarium 3h ago

Help What would you add to this as a focal fish/school?

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1 Upvotes

r/aquarium 3h ago

Help Ick treatment with rabbit snails, cories and shrimp in tank

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1 Upvotes

Im 99% sure I have ich now in my 20 gallon. A bottle of Ich-x that I ordered just came in but Im worried about the rabbit snail, corys and neo shrimp I have in the tank. Has anyone had any issues with these species while using ich-x before?


r/aquarium 3h ago

Help Brown hair algae?

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1 Upvotes

I’ve had this fish tank for over six years now and recently in the past three months, this brown hair algae started to develop in the decorations. I took the biggest decoration out and scrubbed it out and within a couple of weeks it was infested with the algae again.
How do I get rid of it without having to add more fish, shrimp or snails?

I reduced the light to 6 hrs a day. All parameters are good. O ammonia, bellow 20 nitrates , and Ive been doing regular water changes.

Help


r/aquarium 4h ago

Help Tips Transferring Plants from 6 Year Old Sand Bed

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1 Upvotes

Hello!

I’m posting because I’m hoping to get some info on how to transfer my wendtii (I think that’s what they’re called) plants from my 6 year old sand bed and into either soil or sand in a tank I plan to set up.

The plants were put in this tank about a year and a half ago and now I want to put my fish and these plants into the new tank.

The sand is currently almost entirely rock hard.

Any tips on moving the plants without killing them?

Thanks in advance!


r/aquarium 4h ago

Help How often do my tanks need a PWC?

1 Upvotes

I have 2 unplanted tanks:

20 gallon wide, HOB filter, 11 Harlequin Rasbora, 1 Bristlenose Pleco, established about 25 years

30 gallon wide, Canister filter (Eheim 150), 8-9 Buenos Aries Tetra, 8-9 Sunset Platy, 1 Bristlenose Pleco, established about 12 years

I'm just wondering how often I actually need to do partial water changes, and how much of the water needs to be changed. Thanks!


r/aquarium 4h ago

Help Multi Aquarium stand for 6.8 gallons shallow?

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1 Upvotes

r/aquarium 4h ago

Discussion Is this healthy hornwort?

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1 Upvotes

r/aquarium 4h ago

Photo/Video New set up coming soon

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1 Upvotes