Bought a Polygroup 16 X 48 round pool summer waves Elite pool was up kids saw a spot of water starting on the outside in the sand and before you know it the seam was splitting tried to patch it with Gorilla tape and the next day another part of the seam split and completely draind the pool flooding my yard . I might add that i worked in the building of pools for 11 years User's recommendation: DO NOT BUY POLYGROUP POOLS .