does ich have to be introduced or is it always present?

Scuz....positive. just rodi water and oceanic salt, and only about 10 gal of it too. The qt tank I filled using water from my main system. Thing is only my tangs died, the blue chromis are fine. Just checked copper levels again and they are less than .25. Didnt even get a chance to up the dose to correct levels

Most ammonia tests don't work with copper; the little stick on ammonia alert badges. With two tangs, and other fish, in only 10 gals of water with no real bio-filtration-----it sounds like ammonia. Chromis can handle a lot more ammonia than tangs.
 
Man I'm lost. Where did the chromis come from, I thought the two tangs were your only fish?

If you went from no copper to 1/2 the therapeutic level in one dose that might have been part of the problem. I always took 4-6 days to get the entire dose in.

Think about tank transfer instead of copper next time. I think it's a better mouse trap.
 
Hogfan.....it calls for 16drops per 10.5gal. I roughly have 40 gal so I was adding 32 drops the first day and testing and then 32 drops on day two and tested. Still under .50 for copper....this hobby is Definatly a learning process.
 
I know the level didn't read high but I think it's still a lot safer to spread it out over at least 4 days. No way to know if that contributed to the demise of your tangs. You are certainly right about the learning process. Something new every day.

What test were you using for copper? I don't find any of them very easy to use or read. Wish some one would make a better test for copper.
 
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