I need some help with my garden pond. I have been very ill and its got
somewhat ( a lot - I cant see it even) overgrown.

I don't know where to begin. I lost all my frogs/ tadpoles . They did
spawn and I did have tadpoles but they just disappeared altogether.

The pond edges have disappeared under weeds and twitch grass and brambles
but inside is worse. I have an Iris which is now covering over half the
pond. How can I get it out? Its massive!

Obviously I don't want to do too much damage to my "wildlife" - if any is
left. But I have to sort this pond. Help please.