My smallmouth bass has this weird pink/red spot at the base of his pectoral fin and I'm not sure why

[Snap]

Have you tested your water?

Yes

If yes, what is your ammonia?

0.5

If yes, what is your nitrite?

No3 0ppm

If yes, what is your nitrate?

No2 1ppm

If I did not test my water...

...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.

Do you do water changes?

Yes

What percentage of water do you change?

61-70%

How frequently do you change your water?

Every week

If I do not change my water...

...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.

 

[Snap]

My ph is also low he's aggressive and eating fine but he does get nipped at by my largemouth because he is a bit smaller and he breathes a little faster than the other fish but I'm just asking to get some expert opinions because for all I know it could be a life threatening disease or just a injury from being nipped at and none of the other fish in the tank are having any issues

 

[Americancichlidsaredabest]

What is the tank size? What are the dimensions of the tank? How often do you do water changes? Is the tank cycled for you to have ammonia? A good estimate for what you want your water parameters to be is 0 ammonia and nitrites and 10-20 ppm of nitrate

 

[Snap]

What is the tank size? What are the dimensions of the tank? How often do you do water changes? Is the tank cycled for you to have ammonia? A good estimate for what you want your water parameters to be is 0 ammonia and nitrites and 10-20 ppm of nitrate

I do water changes mostly every week but once in a while I'm busy and don't have time but Its usually changed every week or two my ammonia is at .5 and my No2 is at 1.0 and my No3 I'm not sure about I need to get a kit that has it

 

[Americancichlidsaredabest]

If you need a kit I recommend the API master test kit. It has tons of tests and does ph ammonia nitrite and nitrate

 

[FJB]

There is also a small amount of fin rot on the edge of the pectoral fin, on the same side as the other issue. I concur that it is very likely that increasing frequency and volume of water changes will help both issues. Nice fishes, good luck!

 

[Snap]

I do water changes mostly every week but once in a while I'm busy and don't have time but Its usually changed every week or two my ammonia is at .5 and my No2 is at 1.0 and my No3 I'm not sure about I need to get a kit that has it

I just got a new kit and the nitrate is at 0ppm

 

[Americancichlidsaredabest]

What about the ammonia and nitrite?

 

[tlindsey]

My ph is also low he's aggressive and eating fine but he does get nipped at by my largemouth because he is a bit smaller and he breathes a little faster than the other fish but I'm just asking to get some expert opinions because for all I know it could be a life threatening disease or just a injury from being nipped at and none of the other fish in the tank are having any issues

Welcome aboard

 

[tlindsey]

I agree with Americancichlidsaredabest and F FJB . You may have to isolate the smaller bass possibility it may get badly harmed
by larger one.
Also your aquarium may not be fully cycled because Nitrate is 0ppm.
Shake those test bottles for Nitrate well.