So got some new stuff in the mail for my reefer 170 today and ordered a diy net lid for my tank hoping it would arrive today also . Added a zebra barred dartfish however my lid has not arrived just yet and what do you know, I hear a thump thump and look at the floor, there he is laying there. Dang it, quickly picked him up and get him back I. The tank, he was freaked out but everything seems okay. My first action, start looking for a quick solution until my lit gets here tomorrow. Took cardboard lid off my wife’s ugg boots box measured it, fits pretty good, cut out a window, covered with foil to help it from bending at sides too much, covered it all with a good layer of Saran Wrap....... done. Also made sure it was sealed enough that if the fish jumps again he should be safe and have some openings at the back near the overflow for air circulation. Hope this does the trick for a day. Going to shut down the lights early incase it heats things up