Updated: September 19, 2013, 12:00 AM
The extension was due to open early last month in time for Eid Al Fitr, but the launch was held back to ensure the rides were properly tested.
To check the rides for any problems, the park management had Atlantis resort staff test them.
Over 17 days, the new attractions were used by the equivalent of 15,000 riders before they were deemed ready for the public.
The extension, which had its soft opening to the public last Sunday, features four new slides and the longest zipline in the Middle East.
Scott Deisley, vice president of Aquaventure, says the launch was held off because “we really wanted to make sure everything was perfect...”.
Mr Deisley expects an increase in the number of visitors this weekend. But because the extension has almost doubled the park’s capacity, visitors should face shorter queues for the slides.
The Aquaventure vice president, who was among those who tried the slides, said the hardest part was repeatedly walking up the stairs of the park’s 40-metre pyramid.
Mr Deisley says he will continue to try the rides from a guest’s perspective at least once a month, describing it as a perk of the job.