Sand is debris free and does a good job of making a smooth surface for the pool liner to lay on, but if the sand is more than 23 inches thick the bottom becomes soft and footprints will be present. Footprints make for an bumpy pool floor and makes it difficult to vacuum the pool.
However it does not provide a pool floor without foot prints and impressions. The most common used swimming pool base throughout the years has been a mixture of sand and portland cement. Portland cement is available from your local hardware store and can be mixed with sand to form a hard floor.
Aug 20, 2011· It takes average 10 yards of sand to complete the floor and this need to be mixed with cement and moved in to the pool and leveled. It is very hard to mix the cement and sand in a dry form because it as to me mixed several times before it is used.