ONCE I FILLED MY 18 FT X 48" EASY SET POOL I REALIZED THE GRADE OF THE SLOPE IN MY BACK YARD IS A LITTLE MORE THAN I REALIZED. I DRAINED THE POOL AND REALIZED IT IS ABOUT 12 TO 16 INCHES OFF / CAN YOU CONFIRM OR RE-SUGGEST THE BEST WAY TO HANDLE IT. I PLAN TO BUILD A RETAINING WALL, DUE TO THE GRADE OF MY SLOPE, TO HOLD SAND IN TO THE LEVELED AREA. WE WILL GET RAIL ROAD TIES, LANDSCAPING POSTS OR SOMETHING TO LAY ON THE GROUND IN A BIG BOX AND THEN USE SAND TO FILL IN THE GAP. MY HUSBAND SUGGESTED LAYING SAND TUBES IN THERE AND FILLING IN THE CRACKS WITH LOOSE SAND. MY BROTHER IN LAW WORKS FOR A CONCRETE COMPANY AND SUGGESTED USING ALL LOOSE SAND TO FILL IN THE GRADE SINCE IT IS CHEAPER AND WE DON'T WANT TO GO THE EXPENSE OF USING CONCRETE. WHAT DO YOU SUGGEST. I EVEN THOUGHT OF USING CEMENT BLOCKS TO BUILD THE WALL AND DRIVE POSTS IN THE GROUND THRU THE HOLES IN THE BLOCKS TO MAKE IT STURDIER. THE YARD IS SMALL SO I CAN'T GET ANY EQUIMENT BACK THERE, I WILL HAVE TO USE A WHEEL BARROW TO HAUL THE SAND FROM THE TRUCK IN THE FRONT TO THE YARD IN THE BACK. IS THE RETAINING WALL EVEN NECESSARY?? I JUST DON'T WANT TO DISAPPOINT MY KIDS AGAIN WITH ANOTHER ROUND OF MISTAKES.