Eep! Good luck! I just about drowned myself trying to fish 3 insane danios out of a 45 gallon set up. I had originally set up a 45 gallon tall tank in my third floor apartment, cycled, decorated, got it set to go and added the danios. Then I got smacked with a harsh dose of reality from my landlord when he told me I had to take it down due to weight and water damage concerns.. Bleh! I tried everything to get these guys. A plastic cup, two nets, a flexible cutting board to try to "rope" off areas.. Nothing - all while standing on a chair in my dining room. I swear these fish have secret morphing abilities, they'd be on the left side of the tank then POOF, on the right side. Finally, I drained the tank to super low, used the cutting board thing again, and caught them. I must have lost 5 pounds by the end.