Sorry my email stopped updating me on responses some reason. The pool builder was nice enough to let us make monthly payments. The pool has been scraped free of mold I'm unsure if they added a treatment of anything on the ground. About the rust. He sanded it then applied rustoleum paint I think. All in all looks like 2800. For the bottom. They will be applying foam to the wall which is something else the previous owner neglected. The main drain was a single drain and was connected with threaded ends and Teflon tape. The guy could wiggle up and down large amounts on the maindrain plumbing so I figure that's how the ground was kept saturated for that mold
Anyways this is what it looks like now