Missing cardinals - The Planted Tank Forum
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post #1 of 3 (permalink) Old 04-12-2020, 04:04 PM Thread Starter
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Missing cardinals

Hi, I had 12 cardinal tetras in my 20 gl tank, for about 2 month now. They were thriving and everything was fine, water parameters always good because I'm very diligent with maintenance, but since yesterday afternoon 3 of them are gone missing. Only 9 are swimming about and even at feeding time the 3 didn't show up. I'm a bit perplexed. 3 in one shot ?
My tank is heavily planted so I can't spot them if they're hiding or dead by just looking. Tomorrow is maintenance day so I'm gonna have to drain water and shift stuff around to look for them.
What could it be that 3 of them are MIA all of a sudden?
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post #2 of 3 (permalink) Old 04-14-2020, 01:21 AM
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They died and got eaten or are hiding. A small fish gets eaten by its tank mates incredibly quickly. If you don't notice it right away you may never see remains or may just find a bit of skull and spine.
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post #3 of 3 (permalink) Old 04-14-2020, 01:26 AM
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Another possibility is they jumped - check around the tank. Sudden transition between lights on / off is the prime time.
25% MIA in a day is rather concerning - do recheck the water parameters.

And welcome to TPT.
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