A Quick Note on Community Boundaries

Came back after being away a month there was a huge growth spurt. I think I'm going to start attaching it to the walls or letting it hang over.

1-year established 120g tank with 6 small/medium angels, 2 rams, and a bunch of corys. I can never keep rams for more than a few months, as they start spitting food and then die quickly. All other fish are fine with no signs of sickness or distress. No aggression except between the two rams, but they tend to have enough space to leave each other alone. This time, I can see visible signs. Can anyone help me ID what this is? Sorry for the bad video, the rams prefer their caves and only really come out during feeding.

Hi friends :) I’ve had this betta from a pet store a couple months. Her body slightly concerns me I’d love some opinions. Her tummy seems to buldge a bit on her left side as you can see in the photos. Is she underweight? And is it her thin tail making her gill/tummy area look buldged? Or does it look normal to you guys. She eats 4 pellets a day, fasts 1 day a week and has frozen food once a week. Thankyou!! *more photos in comments*

Could anybody confirm if this is some kind of Cyanobacteria? I stared being scared of anything since one issue in my life… Am I in danger or anything? Its been in my tank for 4 months.

I’m quite new to fish keeping, it all started when my fiancé bought home a “depressed” looking goldfish while she was out getting food for our doggos

Now 3 months later, I’ve purchased a 120L tank from Facebook marketplace, and spent hours lurking aquarium subreddits looking on for ideas and honestly just watching the tank

Currently on the day 5 since our brand new second hand tank was filled and wanted to know how my parameters look, all 3 filters came from cycled tanks, and can anybody recommend some more plants for the tank? My substrate is washed Sydney river sand and some natural stones from pet barn, and any liquid fertiliser suggestions

See attached images. Never seen anything like this before, and it’s only the one fish

Pls help!! I feel so bad just throwing it away

This is my first aquarium, so I’m sorry in advance for some mistakes. It’s a four week old walstad tank, and some of my plants are growing with very little leaves, yellowing and pale, almost translucent leaves.
Any help identifying the problem would be amazing.

I’ve had this tank many years just a 20 gallon planted tank with tons of plants and guppies but the last few months I’ve been dealing with hair algae it’s out competing my plants and tangling my floaters till they can’t flow freely anymore the fish aren’t eating it and I’d rather avoid chemical treatments any ideas?

Hi everyone.

I just set up my 200l tank a few days ago.
I’m using a canister filter from tetra, the tetra ex1000.

I accidentally moved the outlet and therefore a bit of water splashed out.
I didn’t realize water was dripping down the back glass because I was hurrying to get some towels.
Now there’s an area on the mat beneath the tank, which I assume became wet.

Is it bad?
I hope it’s visible on the picture.
I’m already so scared that it’s leaking or something cus it’s a rimless tank.

Thanks in advance!

Im beginning to feel like the shrimp situation is getting out of control. I dont want to get rid of them completely, but maybe i could add some kind of fish that could at least eat some of the smaller ones.

However, i dont want something large enough to eat the otos or dwarf chain loaches. Is there such a fish? Doesn't have to be a fish i guess.

so i recently got a betta. next week ill be doing its water change (first time btw).

is it ok if i took my betta out first before doing the water change? he'll obviously be in water. i'll just grab a cup and scoop him up in it with his tank water. is that alright? thank you for any and all suggestions!

Imagine buying a male Platy to keep the Molly ladies in line. to avoid Molly mass murder 2.0, but that Platy is the biggest bitch of a Male live bearing fish ive ever seen. Ive put the meanest Molly in timeout and now my only Guppy (a female) is the male role model my tank needed 😆

the biggest bully Molly is attacking the barrier now though trying to knock it over again to attack other fish again 😭

How long should I keep her separated?? She has murder on the mind 😩

I'm looking to replace my internal filter with an external canister filter, and I'm a little overwhelmed with the choice.
So far I've found a few that have different options, but I'd appreciate a bit of advice going forward.

1. https://www.swelluk.com/swell-external-canister-filter-with-uv-clarifier
   Swell branded, includes UV clarifier, seems like a bargain

2. https://www.swelluk.com/oase-filtosmart-thermo-external-filters#thermo-filtosmart-200
   Slightly more expensive, no UV, but includes integrated heater.

3. https://www.swelluk.com/fluval-07-series-canister-filters#207-external-filter
   Filter media options for every problem it seems.

4. https://www.swelluk.com/oase-biomaster-2#oase-biomaster-2-250
   Includes pre-filter for easier cleaning.

There are many more too, I'm not sure if any of the features should sway me one way or another.
I like the idea of the UV clarifier, but if I choose an integrated heater, I don't have to hang one in the tank. The pre-filter on the biomaster seems like a good idea as it will save on full cleans.

This will be going in to a 200l, heavily planted tank.

(I am not affiliated with Swell, it's just the website that I happened to be browsing on.)

I've been a hobbyist for many years and only recently getting serious about a planted tank, other than replacing plants as they die.

Can someone recommend a simple but effective CO2 system along basic fertilization options.

My water is crystal clear and parameters are good...light on for 6-8 hours. Thanks in advance

Anyone can advice if this is a 0 or 0.25? Or can it be 0.5?

I’m confused because I’m on day 6 of a fish in cycle (please don’t hate me, I inherited this fish last week without any prior notice and he was in a 1 gallon tank before I transferred him.) I started off with some seeded rocks from a fish store, and I stupidly was dosing seachem prime and not doing water changes, because from my shitty research I was told that prime detoxifies ammonia. After finding out that it doesn’t, I rushed home to do a water change, and before doing that I tested the water and the ammonia seems pretty low? I thought it would be way higher than this. Nitrite is at 0 ppm, and nitrate is tough to read but it seems like it’s between 0 and 5 ppm. Why would this be?

The shrimp sleeps under my mystery too

So I have this aquarium that’s basically a jungle of a whole bunch of plants, blackworms, shrimp, ostrocods and their babies (might put daphnia in too) and I’m thinking what to put in it.

The tanks dimensions are 59cm long, 28cm tall and 29cm wide.

I have loads of microfauna, but unlike other micro predators like the scarlet badis the armored sticklebacks will only eat the smallest of microfauna so the population won’t plummet.

But is my setup/tank okay for a pair or two off them?

I got this aquarium quite a few days back. While the in-house filter is good, I think it's unable to clean it all. Do I need one more submersible filter?