One problem with using pool sand in play areas is the danger from contaminants the sand has collected from the pool water. … The dust from this type of sand is a Class 1A carcinogen that can cause a fatal lung condition called silicosis.

Is pool filter sand safe to play in?

It is not advisable to use play sand in your pool filter. The larger particle size and different chemical compositions of play sand mean that much of the dirt and debris in your pool water will just pass through the filter. It just isn’t very effective at cleaning your pool water.

Can a pool sand filter explode?

The filter operates under high pressure generated by a mixture of water and air. The lid can explode off the tank with tremendous force if too much pressure builds up and the clamp fails. Because of the extremely high pressure that can build in the filter and result in an explosion, a failure can be catastrophic.