This hobby is stressfull to say the least

[Snappy]

There is nothing to worry about so as you've already been told -relax. Sounds to me like the tank is cycled and a one inch long dead fish doesn't mean your tank is the problem. What tests have you done? I would stress more over the little skiff of snow we had last night. If you have questions to ask Canreef is the right place to get your answers.