Golden Yo Yo Loach Problems

[FishBoy101]

Tank
What is the water volume of the tank?
75g
How long has the tank been running?
About 10ish months.
Does it have a filter?
2 sponge filters
Does it have a heater?
Yes
What is the water temperature?
76-78ish
What is the entire stocking of this tank? (Please list all fish and inverts.)
4-5 golden yo yo loaches, 4 corydora, 1 rainbow shark, 8 red eye tetras (one also has a side wound), 1 angel fish, some guppies (to be eaten by the angelfish as nothing else has worked), some mollies (peaceful), and 6 black neon tetra.

Aggression wise I do know this is overstocked, but this plan has worked so far (though I am open to suggestions), as well as many fish here are to be.... uh eaten.

Maintenance
How often do you change the water?
I must admit I have been slacking off recently and this has been my first water change in about a month. I did one about 3 days ago.
How much of the water do you change?
About 30 percent or so.
What do you use to treat your water?
A dechlorinator (Looking for it currently).
Do you vacuum the substrate or just the water?
I vacuum above substrate (sand) whilst doing a water change.

*Parameters - Very Important
Did you cycle your tank before adding fish? Yes
What do you use to test the water?
API Freshwater Master Testing Kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0
Nitrite: Currently Testing
Nitrate: Currently Testing
pH: 7.6ish

Feeding
How often do you feed your fish?
Daily
How much do you feed your fish?
An amount of which they finish in 2 minutes
What brand of food do you feed your fish?
The "Tetra" brand
Do you feed frozen or freeze-dried foods?
Rarely, once a month or rarer

Illness & Symptoms
How long have you had this fish?
1 year
How long ago did you first notice these symptoms?
Today, about 40 minutes ago
In a few words, can you explain the symptoms?
Belly up and heavy breathing.
Have you started any treatment for the illness?
My parents put in some salt, but other than that nothing except for taking it away from the other fish.
Was your fish physically ill or injured upon purchase?
Not that I remember
How has its behavior and appearance changed, if at all?
They are quite immobile(Can squirm).

Explain your emergency situation in detail. (Please give a clear explanation of what is going on, include details from the beginning of the illness leading up to now)


Silly question but is this loach giving birth? I know a yo yo loach giving birth in captive is rare(As well as I have them in a community tank), but I can't think of anything else.

P.S-
I have a red eye tetra who has a wound right next to the gills, as well as it seems to no longer be schooling. Pictures to come for the tetra.

So nice to be back on FishLore!

-FishBoy

 

[A201]

Did not notice any abrasions or evidence of disease. Maybe the YoYo was bullied by the Shark or possibly crashed into the aquarium glass while being chased.
If the other YoYos are acting normally, probably nothing to worry about.

 

[FishBoy101]

I see no evidence of disease nor abrasions. I have seen the yo-yo's being bullied by the rainbow shark, but never to a far extent, normally just chasing the loaches around and such. I also have checked the fins and barbells of the loaches and the injured one, and neither seemed to be harmed.

If it did crash, is there any treatment that I can do? Just noticed that all the loaches noses are red, any meaning of that?

EDIT: Breathing seams to have slowed. Don't think its going to make the night.
EDIT #2: Fish died, still looking for reasons of it's death...

Thanks,

-FishBoy