Ouch. that is terrible... Seems like you hear about this happening all too often. You might feel like packing it in now but after a while im sure the lure of the hobby will make you feel like starting a new project
Way to look on the bright side...no pun intended.The only change I've done is add pressurized co2 !! And it's been set up about a month , but yes your right just live and learn , now I have no fauna I am just going to add some intense high lighting and lots of co2 and see what I can grow
Go with a higher quality regulator your first time around and things like this will be much less likely to happen.This makes me real nervous to start my first pressurized CO2 tank in 2 days. Aghhh... so sorry for the loss. I would be so upset if this happened to me.