white protruding bump on panda cory

[blujay23]

Hey guys,
I have a 55 gallon tank. My parameters are good. Nitrates are low. I have had this set up for about half a year. I do weekly water changes. I have had these corys for about 6-8 months with no problems. They are all very active.

2 lyretail mollys
2 guppies
5 panda cories
2 german blue rams
2 swordtails
1 bristlenose pleco

I have a large bubble bar along the back of my tank which my corys love to swim over constantly. There is a protruding white bump on one of my panda corys. At first I thought it was just a fish injury. It was bright red and looked like the wound was bleeding and fresh. I assumed the panda cory got injured because the bubble stream was too powerful. I also have a large rock in my tank that is sharp. Then the wound turned white 2 days later. Does it look like a normal injury that is just in the healing process? Or do you think its some kind of infection or fungus? This cory is still very active, is still eating and is still swimming along the bubble bar.

Should I be worried?

 

[JuiceBox52]

@Byron @Colin_T

 

[Colin_T]

How long has it had the white lump?
How long ago did this start?
Is the white lump fluffy?
If it's fluffy then it's fungus

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

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.

Clean the filter if it hasn't been done in the last 2 weeks. Wash filter media/ materials in a bucket of tank water and re-use them. Tip the bucket of dirty water on the garden/ lawn.

Add 2 heaped tablespoons of rock salt, sea salt, or swimming pool salt for every 20 litres of tank water. Keep the salt in the tank for 2 weeks.
If you do water changes while using salt, add salt to the new water before adding it to the tank so the salt levels remain constant.

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If there's no improvement after a couple of days of water changes and salt, post more pictures. Check the pictures on your computer and try to find some that clearly show the white bit.​