u/Dependent-Eye-8315

We have a small pond (?) on the side of our house made of brick surrounding a cement center. It fills with rain water and leaves etc. and is just sitting water all summer long - we call it the mosquito hatchery. I want to remove it but I’m not sure if this is something I can do myself or need to hire professional help. My only thought is to start swinging a sledge hammer at it. Any tips on how to go about it?