Normal fuses (here referred to as FAST BLO are safer. They go
quickly - so if something serious happens chances are the fuse
will go beforew the spike or whatever it is that's serging through
the systems doesn't do damage for those short moments before
the slo blo blows.
My suggestion: just get a few of the correct value in fast blow.
This way, if something happens and they go, you've got them on
hand and back up in minutes.