Washing up liquid was poured into the Bishopric water feature today (October 30), it is believed.
A large cloud of bubbles has formed in the reservoir section outside The Olive Branch pub, due to reopen tomorrow.
The prank has received a mixed reaction from passers-by and residents.
Dipesh Patel, 22, who’s father owns Horsham News, located opposite the fountain, said: “Personally it’s a bit stupid people coming and chucking in washing up liquid because it takes ages for it to go down.”
And Leanna Curvat, 17, of Lyon, France, who was visiting Horsham with her family, said: “I just want to jump in!”