Has anyone ever placed ingroung anchors for umbrellas and v-ball nets. I am in the process of building a 20 x 40 inground sport pool 5 ft deep throughout. I would like to place anchors for umbrellas directly into the stamped concrete as it is going down. I have not been able to find an anchor that I can put in the concrete that has a top so water doesn't get in when I'm not using it. Any suggestions