<a href=showthread.php?s=&postid=14582539#post14582539 target=_blank>Originally posted</a> by Taqpol
Both fish showed no odd behavior, still swam in the water column, ate food out of my hand, everything. I decided to keep up my feedings (Formula two flakes, mysis soaked in selcon) and let them fight the disease on their own.
Sunday I found my blennies half-eaten body on the sand. This morning (Tuesday) I found the Heni stuck to a powerhead, I removed him to the fuge for closer monitoring/ease of feeding and it died a few hours later. In both cases the fishes were swimming and eating as they always did, and then dropped dead so quickly! These are my first two fish losses, so I'm pretty bummed out.
My question is, what did I do wrong? In 6-8 weeks can i add new fish to this tank given that the CB angel and clownfishes look perfect? It almost seems that for a QT to be effective you would have to do Hypo every time...
I'm sorry for your loss, Taqpol.
We have all been there, or will be there soon.
That's just one of the sad realities of becoming attached to and caring for living creatures.
One mistake people make is believing Ich to be a disease that can be fought off by feedings and a healthy immune system.
It is not.
Ich is actually a parasite, and while a healthy immune system may help prevent or fight off secondary infections of the wound sites it does nothing to prevent the parasite from biting and burrowing in the first place anymore than your immune system can prevent a mosquito from biting you.
What you experienced is common with Ich and is the reason it can be so deadly in an enclosed area like our tanks.
When an Ich parasite drops off the fish it encysts on the substrate to reproduce and divide into hundreds of new parasites.
Normally only a very few out of those hundreds will find a host, but if there happens to be a fish sleeping nearby When those hundreds of new parasites are released back into the watercolumn they can overwhelm the fish with a massive infestation which can eventually cause death.
As I mentioned above, just because your fish shows no signs of Ich doesn't mean that they are parasite-free.
It only takes one hidden parasite to create hundreds of new parasites and infect new fish or cause a massive infestation on a fish that didn't previously show symptoms like the two you lost.
I am sure some here will disagree with me, but your last statement is very true when dealing with Ich.
The only way for QT of new fish to be completely effective against Ich is to treat the QT as if the fish have Ich whether they show any signs or not.
If even a single hidden parasite makes it to your display then all the QT time will have been for nothing.