temp 28°

I recently decided to make use of the space in my Discus tank by introducing a killifish. I maintain my Discus at around 82- 83°F. Do you think its a good idea. There are lots of good hiding places for the killifish.

Not sure if this is an emergency yet, but would appreciate someone else's opinion before I head off to work at 12.30! Yesterday I got a male plakat betta in my newly cycled 30L tank. No problem there - he seems to be settling in slowly.   About ½hr ago I noticed in the 60L tank that there was a...