The granite monument in London's Hyde Park became blocked by fallen leaves, suffered a broken pump and had to be closed two weeks after opening last July when visitors slipped over while paddling.
Health and safety experts were called in and the fountain was switched off while a review was carried out and the stone surfaces were roughened up.
More than 5,000 people an hour visited the tourist attraction last summer and the waterlogged grounds simply could not cope.
Recent repairs have cost £150,000 and have included replacing existing the grass with a robust, 35mm hardwearing rye-grass turf, normally used on sports pitches.
Drainage at the site has also been enhanced, with the installation of 'rootzone slits' to enable the area to cope with extreme wet weather, and metal bars have been placed underneath the bridges to prevent anything getting trapped.