Its just an underwater filter, they are not very good for fish ponds. Its more of a filter for plants and a very small fish load. What you need is a pressure filter with both mechanical and bio filtration..
As for airating the pond goes, this won't do much for you. You can try to turn this into a fountain by retro fitting a pvc pipe to the out flow of the pump (you can try using electric tape or duck tape to hold it in place) . Cut the pvc so that it stands above the waterline. That will push the water out the top and come splashing down into the pond. If you have something to cover the top of the pipe so that it makes the water spray out the sides, then that would be better.
The idea is to get splashing water.
As for airating the pond goes, this won't do much for you. You can try to turn this into a fountain by retro fitting a pvc pipe to the out flow of the pump (you can try using electric tape or duck tape to hold it in place) . Cut the pvc so that it stands above the waterline. That will push the water out the top and come splashing down into the pond. If you have something to cover the top of the pipe so that it makes the water spray out the sides, then that would be better.
The idea is to get splashing water.