Chloe's grandparents, April and Gordon, said they could not understand claims that there were no lifeguards on duty who could have pulled her from the water.
Tour operator First Choice have issued another statement concerning the death of five-year-old Chloe Johnson.
Chloe, from Forest Hill in South London, was on holiday with her family in Egypt.
She died in a water park at the Coral Sea Waterworld Hotel in the Red Sea resort of Sharm el-Sheikh.
Tour operator First Choice say they are investigating the circumstances surrounding Chloe's death.
In a statement they said:
"First Choice can sadly confirm that a child has died while staying at the Coral Sea Waterworld hotel in Egypt. The incident occurred in a pool in the hotel's waterpark.
Our thoughts and condolences are with the family at this extremely difficult time. The British Consulate were immediately informed and they are now working with our dedicated resort team in Egypt, to offer every assistance possible to the family in resort."
ITV News London understands that a five-year-old girl has drowned at a hotel waterpark in Egypt, while on holiday with her family.
Chloe Johnson from Forest Hill had been staying at the Coral Sea Waterworld hotel in Sharm el Sheik.
Tour operator First Choice have said that they are investigating the circumstances surrounding Chloe's death.