after keeping fish for so long, you kind of get used to it. but it is always tough. earlier this year, my wife thought she saw a bug in the kitchen, which just happens to be right above my tanks, and sprayed the bejesus out of it. wifey no like buggies...lol well, problem is, something in the aerosol bug sprays will kill aquatic invertebrates within a few hours. it is ridiculous crazy, i had all my fish survive, but all 10 colonies of different breed shrimps, dead. took about 6 hours and they were all dead. well over 1500 shrimp. it was 100% loss.took me days to figure it out and i was kind of inconsolable for a week. then i figured out what it was, and nicely, yes i actually was nice, told her to please never spray anything in the kitchen again. of course, all those shrimp tanks are now becoming frog tanks, so moral of this long story, when one door closes......