So, I'm getting ready to start doing more solar stuff. Specifically I need to put a big water tank in my basement. However, right now I have a platform of sorts down there. Its very similar to the one seen in the picture below to the right of the water heater. It seems like brick around the outside with a poured center. I need to remove a pad just like this one so that my tank can sit lower. Since its a drain back system I need it as low as possible.
My question to you all is what is the best way to start taking this out? Sledge? Pick? Jack hammer?