I don't see how dubias can cause asthma because there poop is like large sand and they don't smell at all. There is no dust in anything but their food. I have been keeping them for probably a year and there is no problem. I am 99% sure you won't have any problems.
I just set Swordtail's timer for his bath and paused it so I could actually fill his soaking bowl up and he crawled over my phone and canceled the timer
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!