Just seen this on FB thought I would share.
FAQ
Question
Do I need to disinfect my play sand, and if so - how?
Answer
We asked the experts at Milton this question, and this is what they said:
The only reasons for a sandpit to be disinfected is if cats have urinated or defecated in the sand, or if the sand is extremely dirty (for example, if it has a very high level of use) as basic bacteria will not survive in a sandpit as the tonicity would be too high for them and the cell membrane would rupture (i.e., water would be drawn out of the bacteria’s cells into the drier environment surrounding them).
The recommended procedure for cleaning a sandpit is: mix a capful of Milton into 5 litres of water or add 1 Milton tablet to 5 litres of water, in a plastic watering can. Sprinkle the solution onto the sand. Turn over the sand after 15 minutes and repeat until the area has been covered. Ensure the sand is reasonably dry before children continue to play in it.