What does a pond need for a good ecosystem
I'm looking at the school wildlife pond, it was last cleared out 2 years ago. They put some frogspawn in it this year and I've been told it has turned to mush. I'm not sure there are any aerating plants in there, have just spotted some algae.
What do we need in a pond so that an ecosystem can survive in without purchasing a pump. The pond will need to look after itself pretty much.
Will go and inspect it further tomorrow, but here are a couple of photo's, will try and get more tomorrow.