Hospital tank failure

Joe Rice

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I've had 5 lyretail anthias in a QT for about 3 weeks now. It's a cycled QT not a hospital tank so I've not added any meds. They've been doing fine in the QT until one developed a white patch on its side. It seemed otherwise healthy so I assumed it was an infected battle wound of some sort. I set up a 1o gallon hospital tank and filled it halfway with a mixture of water from the QT and water from my display tank (DT). Put a pump in for flow and a heater and then put the injured anthias in the tank. After an hour or so I dosed the tank with Kanaplex.

This morning the anthias is dead and the tank is a bit cloudy. I'm wondering where I went wrong.

I turns out that the salinity in my QT was only 30 ppm (vs 35 ppm in my DT) so one possibility is that I transferred the injured fish from 30 ppm water to 33 ppm water. I've read that suddenly increasing salinity is very stressful for a fish.

Also thinking I should have waited a day before adding the Kanaplex and that I should have added an airstone to the hospital tank just to keep the oxygen levels high.

Any thoughts? I'm sad that I screwed this up for the poor fella' and don't want to make the same mistake again.
 
Hazy water, probably a bacterial bloom that consumed too much of the usable O2. Air stone or powerhead aimed up rippling the surface, or both. Sorry for your loss :(
Plus the higher salinity has slightly lower O2 as well. Usually keep my QT at 1.020 while dosing meds, copper, etc.
 

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