The pool was created with both men and women Aes Sedai. I don't believe the refilling of the pool to be a part of the resealing process for a few reasons that I can think of at present. 1.) Lews Therin has stated that the women refused to go with his plan so the pool couldnt have been part of the first sealing. 2.) An actual seal was inside the pool which I interpret as the pool being created after the sealing and then the seal placed in the pool afterward.