Help on Molly Fish

Sll100

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Hi, I am very new to the forum. Need some help and advise from you all. I have 180 litre tank for last 7 months with Molly and Platy fish. They have been all happy and have given births as well. I saw some having white patches a month back and started loosing some fish. Gave them API melafix per instructions. Thought all is fine but still have 2-3 fish (2 Molly and 1 platy) with a white mark above their mouth. Attached is 2 pics of one which looks seriously injected. Still eats food etc. Please help
 

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carligraceee

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Hi, I am very new to the forum. Need some help and advise from you all. I have 180 litre tank for last 7 months with Molly and Platy fish. They have been all happy and have given births as well. I saw some having white patches a month back and started loosing some fish. Gave them API melafix per instructions. Thought all is fine but still have 2-3 fish (2 Molly and 1 platy) with a white mark above their mouth. Attached is 2 pics of one which looks seriously injected. Still eats food etc. Please help
To me, it looks like they are getting scratched up by something whether it be decor or each other. Monitor the tank for aggression and make sure all decor is not rocky or pointy- anything that they can scratch on.

If you have observed flashing in the tank- this could also be from them rubbing on decor too much which in itself is not okay.

@Colin_T is pro at injuries however and this is just my guess.

I recommend aquarium salt, monitor the tank for aggression, remove all rocky, pointy decor.
 
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Sll100

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Thanks. I will test the water parameters and also remove some sharp things from the tank. Although the rock has been there since the day 1 setup. Although this particular fish was not bad earlier but looks like getting worse day by day. Will aquarium salt be ok with the fish I have?
 

Colin_T

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What is the ammonia, nitrite, nitrate, pH and GH?

How often do you do water changes and how much do you change?
Do you gravel clean the substrate when you do a water change?
Do you dechlorinate the new water before adding it to the tank?

How often and how do you clean the filter?

Did you add anything to the tank in the 2 weeks before this started?

Do you have any pictures of the fish before this started?

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Wipe the inside of the glass down with a clean fish sponge.

Do a 75% water change and gravel clean the substrate. The water changes and gravel cleaning will reduce the number of disease organisms in the water and provide a cleaner environment for the fish to recover in.
Make sure any new water is free of chlorine/ chloramine before it is added to the tank.

Clean the filter if it hasn't been done in the last 2 weeks. However, if the filter is less than 6 weeks old, do not clean it. Wash the filter materials/ media in a bucket of tank water and re-use them. Tip the bucket of dirty water on the garden/ lawn. Cleaning the filter means less gunk and cleaner water with fewer pathogens.

Increase surface turbulence/ aeration to maximise the dissolved oxygen in the water.

Add some salt, (see directions below).

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SALT
You can add rock salt (often sold as aquarium salt), sea 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.
 

carligraceee

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Thanks. I will test the water parameters and also remove some sharp things from the tank. Although the rock has been there since the day 1 setup. Although this particular fish was not bad earlier but looks like getting worse day by day. Will aquarium salt be ok with the fish I have?
Like Colin said- if you only have livebearers, salt is perfectly safe for them and you can even add more. I would follow his directions- update us soon! I hope your fish heals quickly :)
 
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