Replacing the fast tube fuse with polymer fuse
You should always replace safety devices with the exact type and rating. 

The RXEF010 can interrupt 60VAC at 40A max fault current. A ceramic fast blow fuse can interrupt 250VAC at 1500A maximum fault current. 

If you make the same error in using your meter again, and the fault current or voltage exceeds the ratings of the protective device you could be injured, there could be damage to property, and your meter quite likely will be damaged beyond economical repair. 

When you exceed the maximum fault current/voltage the protective device is not guaranteed to open. 

You should not be blowing fuses in your meter regularly. It's better to learn from this and not repeat the conditions that caused the fuse to blow. There are other bad things that could happen- especially with cheap meters- that the fuse will not protect you from. See also my answer here.