Lateral line disease

[SMS]

Is this LLD right above the pectorale fin?
Is it going to get worse< ive had him since he was about 2" and he has never been exposed to high, or even moderately high ammonia or nitrite.
Its too bad cause he was going to be may "show fish". He is only 8" now.
There no chance of this curing right?

 

[OscarRobinson]

I see what you are talking about but I can't tell from the picture. What size tank and how much water do you change a week? From the pic your fish looks pretty damn healthy. Hope someone more experienced can give you some better help.

 

[SMS]

He is ruling a 75g right now. I change about 15% of the water every 5-8 days.