Tetra fish dissapear all of a sudden..... - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 7 Old 04-14-2009, 02:54 AM Thread Starter
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Tetra fish dissapear all of a sudden.....

i have a 90 gallon tank with 5 discus, 1 black ghost, 1 pleco, 1 tiny water frog, and i had about 20 neon tetras now theres only 11 left lol. my discus are 2-3 inches big. discus eat tetras?
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post #2 of 7 Old 04-14-2009, 04:52 AM
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I have witnessed adult Discus take neon Tetras. Not sure, but it is possible that the discus are trying to eat them ,and maybe ghost is finishing them off when they hit the bottom.

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post #3 of 7 Old 04-14-2009, 08:47 AM
It could be either the discus or the BGK.

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post #4 of 7 Old 04-14-2009, 08:54 AM
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i would lean towards the black ghost before suspecting the discus of eating your neons............
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post #5 of 7 Old 04-14-2009, 09:37 AM
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The discus are on the small side to be snacking on neons just yet. I'd suspect the BGK.

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post #6 of 7 Old 04-14-2009, 09:54 AM
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Agree, probably the knifefish. They are avid predators of fish and any live food they can eat, and grow to over 12 inches [according to Baensch/Riehl]. Also note previous thread, comments about these fish eating others and getting 18 inches.

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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]

Last edited by Byron; 04-14-2009 at 09:56 AM.
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post #7 of 7 Old 04-14-2009, 10:19 AM
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Have never kept ghost knife fish and it certainly sounds capable. I would not rule out the young discus. Until just recently I kept six Discus and two were juveniles approx,four inches. (became too much like a job) The young ones ,would grab the threadfin rainbows that they were able to catch. I lost two of ten in this manner. I have since found new homes for the Discus and currently have a small group of severums and another group of Angelfish. Had to move the threadfins to their own tank.
In a unrelated case,, I have caught many six to seven inch Largemouth bass on lures or surface plugs twice their length. Always wonder what their intentions were. Suspect they were reaction strikes and would not be surprised ,to observe this with Discus,being the cichlids that they are.

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