How to make a quarantine tank/hospital tank

[mikeclarke]

Thanks guys... I have a 20 gallon with a hang on filter (aquaclear with foam and the limestone chunks), a tiny piece of live rock, and like .5cm of sand to make the tank look a bit nicer (it's in our den). I also have an air bubble wall and and a big cheesy pirate ship for the fish to hide (for the kids).

I had been doing a 25-50% water change (5-10 gallons of water from the 100 gallon tank) weekly (I do a 10% water change in the big tank weekly) and I ended up having my yellow tang and flame angel that I just bought, die. I thought I was doing something wrong. I had added prime every couple of days.

The nitrate was always less than 5, so what did I do wrong?

[mikeclarke]

Oh yeah...

I haven't used a powerhead in the QT tank as I have my Koralia nano in my new salt water tank. I kept the temperature at 78.

[kien]

Had the 20g been up and running for a while or did you just set it up for Qt'ing recently? Do you know if the QT tank was cycled already? Or were you reading ammonia and nitrites in the QT tank? If there is any of each (ammonia or nitrites) that could spell trouble for the fish. Aggressive water changes will help dilute it but its still there unless the tank has sufficient bacteria from a cycle.

[kien]

Originally Posted by mikeclarke

Oh yeah...

I haven't used a powerhead in the QT tank as I have my Koralia nano in my new salt water tank. I kept the temperature at 78.

Water movement is good in any tank. It helps prevent stagnation.