cardinals in QT - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 4 Old 10-04-2012, 04:08 PM Thread Starter
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cardinals in QT

I have got 10 cardinals in my 5 gal QT for about 2 wks now. I do not want to add them all to main tank (25 gal moderately planted) at the same time. I would like add in batches. Any advice how many at a time and how space the batches time wise? Thanks.
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post #2 of 4 Old 10-04-2012, 04:50 PM
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I think you could add about 2 or 3 each time, and I would suggest waiting 3 or 4 days in between (maybe do a small water change after.)

happy owner of a wild type GFP axolotl named Percival and too many guppies to count.
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post #3 of 4 Old 10-06-2012, 07:28 PM
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I would add them together, they will settle in much better. I assume your concern is the ammonia, but if you have plants as you mention, this should not be an issue. Floating plants should be present, to calm this fish but also to use the ammonia even faster.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #4 of 4 Old 10-06-2012, 08:06 PM Thread Starter
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Yes, I am concerned about having a sudden increase in bio-load, though I was told cardinals are small bio-load. I do have anacharis mostly planted, but a few stalks floating. I am planning to add 5 now and 5 about a week later. I would hate it should anything bad happen. I have been very good (this time!) with these school of cardinals - proper QT with daily ~50% water change and everything... Thanks.
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