The Island East swimming pool complex in Sai Wan Ho was temporarily closed yesterday for cleaning and super-chlorination after faeces and vomit were found in pools. It was the second time since the swimming season began in April that an entire complex had to be closed because of fecal contamination, the Leisure and Cultural Service Department said. It urged swimmers yesterday to be considerate and not to go swimming after a full meal. The closure came amid public concern over the cleanliness of water in public pools. Last month, tests on water samples taken from the Morse Park pool complex found the count of the bacterium E. coli exceeded the safety limit of 100 per millilitre, with some samples as high as 280. The department closed six of the pools at the complex for three days for cleaning. Inspections showed that the sterilisation and filtration systems were working properly and the hygiene of the surrounding environment was also in order, the department said. The cause of the E. coli problem was still unknown. The department said it was getting the laboratory to check whether the water samples had been tampered with. It did not identify the laboratory. A spokesman for the Hong Kong and Kowloon Lifeguards Union, Alex Kwok Siu-kit, said: 'The water quality of Hong Kong's swimming pools is already very high. 'The pool cleaning system we use is very advanced. It would be very unusual to find high levels of E. coli in the water.' Test results updated yesterday showed samples taken recently from water in all 37 public pools were up to hygiene standards. No E. coli was detected in any of the pools.