400 gallon project

[MitchM]

Any chance of getting him into a quarantine tank with UV while you treat with antibiotics?
Are the 3 slash marks a result of scratching the affected area, or is the white patch a result of something spreading from them? Is he rubbing against objects?
Not nice to see.

[untamed]

No... No rubbing. I get the impression that any touch is painful and that is causing the panic swimming. The white patch is first...as it got larger, the red lines appeared.

It is very unlikely that I could get him out of the tank at this point.

[MitchM]

Each antibiotic has a spectrum of bacteria which are susceptible to it, and under-dosing may result in the creation of a bacterial population resistant to the antibiotic that you were using.
I guess if it was my tank I would try to section the tank off using some egg crate and try to catch him. Remove him so the infection and treatment doesn't affect the other aquarium inhabitants.

[MitchM]

Erythromycin dosage is recommended at 250 - 500 mg per 20 gallons every 24 hours with a 25% water change before each treatment. Treat for 10 days.

[untamed]

Originally Posted by MitchM

Erythromycin dosage is recommended at 250 - 500 mg per 20 gallons every 24 hours with a 25% water change before each treatment. Treat for 10 days.

What if I fed it to him? Wouldn't it be more effective than trying to dose the whole tank?

[MitchM]

A few unknowns:
Is the bacteria was coming from inside the fish? The medication won't be very effective if the bacteria originated from outside.
What will the liver do to the erythromycin as it passes through?
I have no idea what the dosage would be for taking it internally.
HAving said that, it could be worth a try.
What size tablets do you have? Maybe we could figure out a concentration from the recommended tank treatment.

[MitchM]

I did come across this chart from Frank Greco
However, it states that both antibiotics that you have are ineffective when taken internally.

It show a dosage of 20 mg/kg of erythromycin and a similar dose for kanamycin.

[untamed]

Originally Posted by untamed

What if I fed it to him? Wouldn't it be more effective than trying to dose the whole tank?

Hmmm... It seems that Maracyn doesn't taste very good. Option to feed it to him probably won't work. I have the powdered packets.

[Tom R]

Hi Brad

Are any other fish showing any sighns?

I have some Proto Marin left from when I was fighting Ich and Velvet if you want to try it.

Tom R