freshwater Knight Gobies and white cloud minnows?

Question

Just went to favorite fish store where i trust the fish guy there, he has never b/s me before that i can tell, he knows how i am about aggressive fish and usually tells me if a fish i am looking at is a bad choice for my tank. I was liking the Knight Gobies, and told him they would be in with Zebra Danio's and White Clouds, he said they would be fine. i had five white clouds that were healthy when i put the two knight gobies in the tank. after 6 hours of them being in the tank i am down to two White clouds. my gues is that the Knight Gobies are eating the White clouds. they are in a 24g tank with one small mollie, two small flying foxes, two panda corydoras, two zebra danio's and now two white clouds. Are the Knight Gobies eating the White clouds and if they are how do i stop them from eating the rest of the fish. Should i just take them back?

Answer 1

How big are your white clouds? Knight gobies will eat small fish, but the knights only get to about 3", so I'd say either your white clouds are small (they should get to be about 2" as adult), they're hiding really well, you got a goby species other than a knight, or he ate them:

http://badmanstropicalfish.com/profiles/profile98.html

Your options would be to use a tank divider, get them a separate tank, or take them back and explain what happened.

Also, knights are territorial, so I hope you have an adequate tank size and/or a male & female goby.