Any ideas for this broken pond?

Evening all, this is going to be one of my projects this year... At the moment it's full of tadpoles, who seem to be taking their time to grow up , ....once they are gone, I'll be looking at what to do. It currently leaks so the water level is up and down like a yoyo! It's about 3 x 2m, Any ideas would be welcomingly received

 

Hi @Ian Taylor sorry I had Internet problems so this thread was posted twice! Yes I thought that, do you know if a solar power unit work on a pump rather than trying to get electricity to it as there is s good distance between the pond and house?

 

Hi @Apple Blossom yes you can get solar powered pond pumps don't know what there like

 

Thank you @wiseowl, I wouldn't have considered the sand and would have just put the liner down so a very good point (ps any advice on my weeds thread? )

Morning @Ian Taylor, yes I've been researching them on the Internet and looking for advice solar v electric that way I can plan early on what I need to purchase