Platy problems

Gamergoldfish

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Gills are flayed out. Also gasping, isn't swimming very well. I don't know what it is.
 
Hi and welcome to the forum :)

How long have you had the fish?
How long has the tank been set up for?
What is the ammonia, nitrite, nitrate and pH of the aquarium water?
Have you done anything to the tank in the last 24 hours?

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Do a 75% water change and gravel clean the substrate every day for a week. This will dilute any chemicals or poisons that might be in the water.
Make sure any new water is free of chlorine/ chloramine before it's added to the tank.
 
Hi and welcome to the forum :)

How long have you had the fish?
How long has the tank been set up for?
What is the ammonia, nitrite, nitrate and pH of the aquarium water?
Have you done anything to the tank in the last 24 hours?

------------------
Do a 75% water change and gravel clean the substrate every day for a week. This will dilute any chemicals or poisons that might be in the water.
Make sure any new water is free of chlorine/ chloramine before it's added to the tank.
I got it 2 days ago
Tank has been set up for a year or so. (I did change water routinely)
Idk. Ammonia should be fine. pH is 7.5 last I checked.
I did a small water change and put a few peas in in case of swim bladder.
 
I got it 2 days ago
Tank has been set up for a year or so. (I did change water routinely)
Idk. Ammonia should be fine. pH is 7.5 last I checked.
I did a small water change and put a few peas in in case of swim bladder.
I also have a couple more and they're fine. 10 gallon.
 
possibly a gill fungus or infection if the tank has been set up for a while and well maintained.

monitor the remaining fish over the next couple of weeks and hope they don't catch anything.
 
It's me but I forgot my password so I made a new account. I think one has fin rot. If condition gets worse I will get medicine. Tail is rapidly disappearing. But all other fins look fine. Other fish look fine
 
You can add some salt to the tank. It can treat minor infections like fin rot and you hopefully won't need to use chemical based medications.

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SALT
You can add rock salt (often sold as aquarium salt) or swimming pool salt to the aquarium at the dose rate of 1 heaped tablespoon per 20 litres of water. If there is no improvement after 48 hours you can double that dose rate so there is 2 heaped tablespoons of salt per 20 litres.

If you only have livebearers (guppies, platies, swordtails, mollies), goldfish or rainbowfish in the tank you can double that dose rate, so you would add 2 heaped tablespoons per 20 litres and if there is no improvement after 48 hours, then increase it so there is a total of 4 heaped tablespoons of salt per 20 litres.

Keep the salt level like this for at least 2 weeks but no longer than 4 weeks otherwise kidney damage can occur. Kidney damage is more likely to occur in fish from soft water (tetras, Corydoras, angelfish, Bettas & gouramis, loaches) that are exposed to high levels of salt for an extended period of time, and is not an issue with livebearers, rainbowfish or other salt tolerant species.

The salt will not affect the beneficial filter bacteria but the higher dose rate (4 heaped tablespoons per 20 litres) will affect some plants and some snails. The lower dose rate (1-2 heaped tablespoons per 20 litres) will not affect fish, plants, shrimp or snails.

After you use salt and the fish have recovered, you do a 10% water change each day for a week using only fresh water that has been dechlorinated. Then do a 20% water change each day for a week. Then you can do bigger water changes after that. This dilutes the salt out of the tank slowly so it doesn't harm the fish.

If you do water changes while using salt, you need to treat the new water with salt before adding it to the tank. This will keep the salt level stable in the tank and minimise stress on the fish.

When you first add salt, add the salt to a small bucket of tank water and dissolve the salt. Then slowly pour the salt water into the tank near the filter outlet. Add the salt over a couple of minutes.
 
It's me but I forgot my password so I made a new account. I think one has fin rot. If condition gets worse I will get medicine. Tail is rapidly disappearing. But all other fins look fine. Other fish look fine

A ten gallon tank is really too small for platies which are good swimmers and outgrow that space rapidly, what other fish are in the tank?

I'm suspecting, since you also said you did a small water change, and that there are others, that the tank is a bit over-stocked and under cleaned, and that will result in issues like you're seeing now. Best bet is to begin doing much larger water changes, so the fish have fresh clean water to boost their immune systems and help them fight off any illnesses (making sure to use water conditioner for the new water, and temperature match it to the tank temp before adding). If you've been changing 20% of the total water, increase that to 40% next time, then 60%, and then begin doing 75% weekly as maintenance, once this has cleared up. Give the substrate a good clean each time you do a water change.

Doing the salt treatment routine Colin outlined above is the best first course of treatment, this is just my suggestion for what might be the underlying cause, and to improve the maintenance routine going forward.
 

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