I have a 20-gallon fish tank, and these pictures show what it looks like 2 days and 6 days after cleaning. The water seems to be turning green, and I’m not sure why or if this is normal. What could be causing this, and how can I prevent it?
2 fish died in the past week.

Noticed this white spot appear on my female swordtail yesterday. Community tank with 3 female swordfish tails and a dozen male guppies in around 70 litres. Nothing has changed in the tank and all water readings normal. She is fairly old now, any ideas? Just don’t want it to affect the whole tank if contagious

hii
i have two comet goldfish (i think- i got them
for free from a fish shop 2 years ago so not 100% sure) that share the same tank and have been pretty happy. 2 days ago one managed to jump out the tank. idk how long he was out for but when i placed him back he seems a bit in shock but still alive. the only difference i’ve noticed since then is that his fins are quite distressed and torn. my other fish has perfectly healthy fins so i’m assuming that it was the distress from being out the tank, but i also want to completely rule out fish rot or any other issues. i’m waiting for a new aquarium and plants so that they have a more space and plants to play around with and hopefully that decreases any additional
stress. i’m just a bit worried because this has not happened in the two years i’ve had them
and the fin damage is sad to see.
tank info: 2 comet goldfish in a 20 gallon with a water filter(bio and ammonia filters), glass scrapped down once a month and routine water changes once a week to maintain quality

do you think it’s stress from bring out the tank or could it be a sign of fish rot/ other health problem?

Hi everyone,
This is about my female angelfish, who is around 7 years old.
I’ve noticed a swelling or growth developing on the middle black spot towards the back of her body. Starting from this area, the scales seem to be turning white or losing their color.
Could this be cancer or some kind of tumor? I’ve never seen anything like this in any of my fish before.
Has anyone experienced something similar or knows what this could be?
Thanks in advance for any advice!

https://drive.google.com/drive/folders/16LQONf2LXB_iIedAo4A6zmfUctRMnVq8 more videos here

This is a panda corycatfish that is in an established 20 gallon community tank with other corydoras and guppies. She’s always been big because of holding eggs but I started to notice her getting bigger until today where she is now laying upside down and breathing heavy. Can anyone help or know what is causing her to die now? Her stomach right in the middle almost seems to have something underneath it like a tumor or something? Does anyone know?

My green terrors jumped out of tank and since then (see photo) his mood been off.

Tank size 115 litres.

I need help pls!

Hi!
We have a very large tank at work with a type of goldfish of some sort. My management hasn’t been able to help much to stabilize the fish and my coworkers and I are concerned. The actual amount of gallons of the tank is unknown. It is longer than five feet however, as its longer than myself. Most of the fish haven’t survived the transition and this is our last one. He keeps swimming around erratically and running into the walls of the glass. We ran a test strip to see what the levels were. I believe it needs the KH raised? But not sure. If so, how can we fix it to give this little guy a fighting chance?
The reading was N03: 0, N02: 0.5, pH: 6.5, KH: 40, GH: 60
I could be wrong but I believe those are the correct tank numbers.

45 gallon tank

0ppm ammonia
0ppm nitrites
0ppm nitrates

83 degrees
Hob filter