Red swollen bumps?

[J'sRamAir]

Two of my praecox rainbows (one female and one male) have red swollen bumps at the base of their tails. The female got one first several weeks ago. I thought it started to shrink some, but ended up getting worse. Now just today I noticed one of my males is starting to get the same thing my female has. I guess it's contagious afterall. My female has discoloration of her skin in areas (kinda darkish areas, but the spots look internal) and she's pretty thin. Acts like she wants to eat, but she spits most, if not all, of her food out. I'm going to the LFS tomorrow and get some medication of some sort, but I have no idea what this is. I checked on this site: http://www.fishyfarmacy.com/symptoms.html , but couldn't pinpoint what my fish have. Anyone have any ideas?

 

[Darkside]

Try going here.

This is myfishtank.net's own diesease database try finding the one that best matches your description.

If there is not there. You best bring the fish to the LFS. Ask an expert, or buy a fungal remidy.

If this still does not work you should add a medical amount of salt.

 

[Lotus]

It sounds to me like it might be roundworms. There are some pics here: http://www.fishpalace.org/Disease.html#Worm It also recommends treatment.

 

[J'sRamAir]

Well I checked both of those sites and I didn't see anything that looks/sounds like what my fish have. I took a couple really bad pics so you guys can see them. Just copy and paste.
http://www.geocities.com/jsramair/Rainbowx01.jpg
http://www.geocities.com/jsramair/Rainbowx02.jpg
http://www.geocities.com/jsramair/Rainbowx03.jpg

 

[J'sRamAir]

I went to the LFS today and the only medicine he could think of using is Naladixic Acid...aka Naladin made by Aquatronics. Hopefully that will work. But something doesn't make sense. On the package it says to only use once and to do a 33% water change in 24 hours. However, on Aquatronics' website they say you can dose up to 3 times over a period of 5 days. They also say to do a 50% water change after 3 days. http://www.aquatronicsonline.com/product/product3.htm They are very much contradicting themselves. I tried googling for Naladin and Naladixic Acid but didn't find many specifics on what it does or on water changes after dosing. Anyone have any experience or knowledge of this medication?