Zebra Danio Missing From Tank

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Any ideas as to why my two Zebra Danios have gone missing each on separate nights. My tank is fully covered and I checked around the tank just to be sure. I think one or two of my fishes are eating them, I have 2 ID sharks, 1 whiksers catfish, 1 albino tail shark (cant recall the exact name).

But any ideas guys?

Has anyone experienced the same thing?

Although, my zebra danios were doing fine, I lost both of them on two separate nights. Almost like they are getting killed one by one. I have two left in the tank now, and I am afraid to see in my tank in the morning.

Thanks for your help.

 

[rleigh]

Do you have an underground filter.?
On two different times, I have had zebras swim into and down the bubble tubes.
Look underneath the gravel. If you turn off the filter, leave the light on, they will eventually swim up and out. My did !

Randall.

 

[england]

what do you have in your tank like wood / rocks etc?
a looong time ago i had 5 zebra danios 1 night i went to bed woke up in morning and noticed only 1 uhh...
looked every where for them was sooo confused ....last resort i picked up the bog wood and there was all 4 dead......so strange............so now i build up gravel aound my rocks n wood......hope it helps