Help! Weird growth on dwarf gourami lip!

One of my dwarf gouramis has a weird growth on their lip. I’m wondering what it could be?
I quarantined a guppy earlier today due to what looks Like the start of columnaris disease. I added a small dose of aquarium salt (7 teaspoons) in an attempt to kill any free swimming bacteria, without harming my fish or plants.
I can’t get to medication tonight, but I will be Able to tomorrow.


Some quick stats about my tank
30 gal planted/driftwood tank
3x guppy’s
2x dwarf gouramis
2x sepera tetras
1x cherry shrimp
1x Amano shrimp
1x albino Cory

Age of tank: 2 months
50 gallon canister filter

Hi and welcome to the forum

Have you added anything new to the tank in the last 2 weeks?

Can you post another picture so the white bit is in focus. And show it from a couple of different angles.

If you post pictures of the sick guppy we might be able to tell you what is wrong with it.

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7 teaspoons of salt won't do anything in a 30gallon tank.

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, 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 will affect some plants. The lower dose rate will not affect plants.

After you use salt and the fish have recovered, you do a 10% water change each day for a week. Then do a 20% water change each day for a week. Then you can do bigger water changes after that.

Thanks, I will add more salt. I do have two dwarf gouramis and 2 tetras so the salt would harm them.

Yes the guppy I quarantined is new, and here are some pics of the gourami.

The guppy is in a large 2 gallon container that I use as a quarantine, so pics of her will be hard to get, especially without stressing her out more. But I’ll see what I can do.

Apparently the pics of the guppy are “to large” for the servers, which kinda sucks because of its not Columnaris I’d love to put her back in the tank.