If you are worried about spider mite eggs being present in the soil, you can bake the soil. Take a look google for the correct temperature because if you do it correctly you can kill off the eggs but retain the bennies.
Why don’t you crack the bag and see for yourself? You said, “people say.” Unless the shop you bought it from doesn’t store it correctly or has a pest issue, you should be fine.
I used happy frog with no issues
I don't think spider mites spend any part of their life cycle in soil.
Ok cool I read something about Happy Frog and mites and had to fined out were I bought the soil though it was in the parking lot so it wasnt inside .
If a seller stores bags of cannabis soil outside in the weather, I would shop elsewhere, unless you're in the desert or something.
No but it's in the 20s at night and 30s during the day would the freezing Temps kill what ever may be in soil mites of any kind I would think