Treating a Yellow Tang with red blotches

[thabizness]

I am going to treat my yellow tang with erythromycin for red blotches on his body. I was going to use a old 20L that I planned on using for a sump later next year. Will using this med kill the chances of using this tank, heater, and power head in a reef later as copper would do?

My normal QT has other fish in it in copper at the moment and didn't want to dose anything else.

 

[melypr1985]

I'm pretty sure you can just sterilize the 20L with vinegar and water or bleach (rinse well), letting it dry completely afterwards should make it safe to use later.

 

[Humblefish]

Is this a newly acquired YT? Some fish will get red streaks due to osmotic shock; these streaks show up particular well on a YT. If you scroll down here to where it talks about "Acclimation Stress" you will see a pic of a YT with this condition: http://chucksaddiction.thefishestate.net/disease.html

Then if you scroll down further to "Internal Bacterial Infections" you will see a closeup pic of a YT with an actual infection which needs to be treated with antibiotics.

 

[thabizness]

I have had this fish for a few years.

 

[Humblefish]

I have had this fish for a few years.

Probably a bacterial infection then. Erythromycin should knock it out, but you can add minocycline to this to widen the spectrum.