Plans are in motion to improve the health and fate of fish at Feltham pond.
A fence was put up around the area on Feltham Green for about a month towards the end of May after the unexplained death of a number of fish.
The results of the water tests revealed the problem seemed to be a lack of oxygen getting into water due to a thick layer of silt, made worse by people feeding ducks bread which sinks to the bottom.
The council say they are looking to clean up the pond and install filters and plant reeds for a healthier and improved looking pond.
They also confirmed all fish have been removed from the pond and taken to Bedfont Lakes.
A council spokesman said: “The pond was closed as a precautionary measure while we waited results of tests following some unexplained deaths of fish.
"These tests have come back showing there is no risk to people’s health, so the fencing has been removed allowing people to once again enjoy the pond.
“The investigation did identify a thick layer of silt having built up on the bottom, which has been made worse by uneaten food given to wildlife (ducks, geese etc) that sinks to the bottom.
“We moved most of the fish from the pond last year to Bedfont Lakes, and are working on plans to improve the health of the pond so it continues to be a much loved feature of Feltham for both residents and wildlife.”
In October last year, a major clean up was carried out as aquatic life became endangered due to reduced oxygen levels, and more than a tonne of debris was removed including bicycles, scooters and traffic cones.