my mad minow

[munkybutter]

i have two white cloud mountain minws in a small tank, and one of them goes mad when the undergravel filter is on, why?
i dont think its water quality as only the one fish does it n the other just watches looking slightly dissaproving (if a fish ever could)

(by going 'mad' i mean shooting up and down very fast.)

i had them off my aunt a few weeks back and the tank they were in had a fluval 1 filter, does my fish just hate the undergravel filter or is there something wrong with him?

 

[jeffrey]

no idea, but I always thought them under gravel things were just a sham. and you cant use sand.