All fish dead in qt tank

Theo Reef

New member
Please please please help me.

I had 2 qt set up. Both of them I used seachem matrix in a small canister filter, fed stability and used safeguard, heater and light. This I did for both of them. Both of them I had at a sg of 1.090 for 2 weeks. At the 2 weeks mark things got bad. The one tank I had a yellow belly regal and a lipstick(60L tank). The other I had 16 small clownfish, snowflakes, black ice and pucassos ( 50L tank). Ok the first tank.

Tank 1: I never had any problems with ammonia, did a wc every second day (20L) and nitrates was always in check. One night out of the blue the nitrates shot up to 60, water was cloudy and had a foul smell. I immediately made a new batch of hyposalinity water and matched the kh, did a 80% wc. Fish seemed fine throughout the night. The next morning the were breathing heavily, tested ammonia and it was 30. Both fish died the same day.

Tank 2: did the exact same with the clownfish tank, this morning I woke up and 5 of them died. Ammonia is undetectable, nitrate was 50 so I did a 80% wc on them as well. Out of the 16 only 4 survived but not sure for how long.

So what the hell am I doing wrong? I've lost so many fish in qt that I'm starting to think of breaking down the tank. Qt is supposed to be a stress free tank and prepare your fish for dt. What am I doing wrong??? How can I set up a qt that is stress free? How do I stop killing my bloody expensive fish?
 
Pictures of the QTs may help.
Also, what technology (pumps, filter, skimmer,...) do you use on the QTs?
What "decorations"/shelters do you have in those tanks?
What cycling method do you use on your QTs?
How do you measure the salinity for hyposalinity? If refractometer, what brand and how do you calibrate it?


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I use a small canister filter with seachem matrix in it, that also create flow. I don't use any skimmer on it. I use a pure aquatic refractometer to measure salinity. Use RO water for calibration, use 1 or 2 pieces of pvc bends for hiding places. For cycling the qt I used seachem stability and also stressguard.
 
How long after dosing Stability did you add fish? Stability is bacteria in cyst form so it takes longer for it to be able to process ammonia.
 
Tank one is the only one who had an ammonia spike. Begore the spike the fish was in there for 2 and a half weeks. No ammonia whatsoever. Same with tank 2- never had ammonia and only had a nitrate spike.
 
Tank one is the only one who had an ammonia spike. Begore the spike the fish was in there for 2 and a half weeks. No ammonia whatsoever. Same with tank 2- never had ammonia and only had a nitrate spike.

How prevalent is Velvet (Amyloodinium) and Brooklynella where you live?

Those are two fast-killing parasites which hypo will suppress symptoms of, but not fully eradicate.
 
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