i got a diamond watchman goby 2 days ago and since i put it in the tank it has been digging huge holes everywhere and making the tank really cloudy and i was wondering if this will stop or if this will keep going on
I would guess that he is digging up some of the sand dust that was buried a bit deeper and couldn't be carried away by ur powerheads. I don't think it will be a problem. You might get a bit of a diatom bloom cause that dust probably has silica in it.
Just watch your filter. You might want to change the filter pad or sock ( whatever you have) I bit more frequently than usual cause it will be filtering all that stuff out until your bed is clear.