snagged a Sa3500,,now what fuse size ?

[ramlion 0]

i  have the big 3 ,,0 gauged on all points , also have 0gauge ran to mount area and 0ground under 3feet,, i have a 300amp fuse, am i doin this wrong, i plan to run the amp down to a 1ohm load daily ,, will the 300 do well or do i need to step it up to  a 350 or bigger,,

[jonbearsmt 919]

300 amp is fine