Help! No idea what is wrong with Platy fish

[Platyfishwoo]

I have had my female platy Dora for about 3 months now.

She was all good at first but over the last few weeks I’ve noticed her top fin looking weird, almost like it was going transparent.

I’ve also noticed she’s very skinny (she’s a sunset so maybe just the type?) compared to my other females that are quickly our growing her.

Over the last week she’s been hiding more. She is still active most of the time but today I noticed she would get a piece of food in her mouth and immediately spit it back out.

Her fins are also clamped a lot of the time. My water parameters are fine. 0 ammonia, 0 nitrite and nitrate 10

I have attached photos to help

 

[Colin_T]

Hi and welcome to the forum

Check the water quality for ammonia, nitrite, nitrate and pH.

Do a 75% water change and gravel clean the substrate every day for a week.
Make sure any new water is free of chlorine/ chloramine before it's added to the tank.

Make sure the other fish isn't picking on this one.

If the water quality is good (0 ammonia, 0 nitrite, less than 20ppm nitrate), and the other fish isn't picking on it, add some salt, (see directions below).

------------------------
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.

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, 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.

 

[Platyfishwoo]

Okay that’s great, I will do that.

Thanks very much for your response