How is it you keep your Endlers from flying out of that open-top tank?
I put in 12, went to church, came home that night and 5 were on the floor.
Got a small Aqua Japan tank with a lid! Of course the lid has a gap of about 1/4" around it.... you guessed it - another 5 out in 4 days.
I have two left.
How you keeping them in?