The AquaBasins are very strong because it is made with high density polyethylene. The square design makes it capable to hold more water and it has a flat surface making it extremely easy to place and re-position fountains on. It supports up to 1,200 pounds and holds up to 75 gallons. It has two 9”x16” corner pump access panels. This is large enough to fit those larger pumps. The corner panel is also raised up so that any gravel, stone, etc. does not fall inside the basin when opening for maintenance. Great for disappearing water features, fountains and other pondless applications.