Barbs Getting Sick, Please Help, New To This

[Jacomagoo]

Tank size: 30 Gal,
pH:7.6
ammonia:0
nitrite:0
nitrate:10 ppm
kH:
gH:
tank temp: 79 f

Fish Symptoms (include full description including lesion, color, location, fish behavior):
Green tiger barb swollen, white marks on left side looks like scales are missing sorta. It seems to get worse and then better in a matter of minutes. same patches appearing on my rosy barb and I think on my bolivian ram though it's hard to tell because he is white. no swelling in any other fish except the barb.

Volume and Frequency of water changes: 30 gallon tank i moved them from a 10 gal about a month ago. water changes weekly and large water changes bi weekly

Chemical Additives or Media in your tank: 0

Tank inhabitants: 1 german blue ram (had two until a crawdad that no longer lives in the tank cut one in half) 1 green tiger barb, 1 rosy barb, 1 bolivian ram they've lived together for about a year and a hlaf and are so big im afraid to add any new fish!

Recent additions to your tank (living or decoration): bowl rock

Exposure to chemicals:none

Digital photo (include if possible):
I APOLOGIZE THESE ARE SO BAD I WAS IN A HURRY

Does it look like Columnaris?
I'm thinking a 50% water change and Maracyn? after reading the boards i'm reluctant to medicate until i'm sure.

 

[Jacomagoo]

Update...been watching him for a bit. He'll swim in one place level for a while and then slowly his head will move down as if hes searching for food but he's not . He gets almost vertical and then goes back ti being level again.

 

[Jacomagoo]

Well i'm certain it's not ich now...been reading up on the forums and haven't really figured it out yet. Did a 50% water change and I'll see how it goes. any help still would be great.

 

[WILDER]

Any signs of flicking and rubbing.
Do the white patches look fluffy in appearance.
http/www.flippersandfins.net/flexibacter.htm

 

[Jacomagoo]

Any signs of flicking and rubbing.
Do the white patches look fluffy in appearance.
[URL="http/www.flippersandfins.net/flexibacter.htm"]http/www.flippersandfins.net/flexibacter.htm[/URL]

no rubbing or flicking, not really fluffy, where it gets really bad it seems to be making an actual indentation in him. its been 90+ degrees here and the water temp is pretty high now. he's swimming around a bit more normal like but the stuff seems to be worse. I'm noticeing white flecks on a few other fish and i'm now wondering if I have multiple problems. I'll take some time to get some better pics maybe that will help.

 

[WILDER]

If there no flicking and rubbing I would treat it as bacterial.
Bleached out marks on fish can also be columnaris.