I have inherited a small pond with 5 large goldfish.

I have a pump in the pond but it requires cleaning out every 2 days as it gets clogged up very quickly.
During the winter the water was as clear as crystal but now as the weather warms up im notcing alot more algae(i think) and green slushly stuff.

There are currently no plants in the pond.

What do i need to do to improve the water and to help keep my pump filter clear?


Many thanks