OXYGEN levels at a lake in Portishead is now 'back to normal levels', a council has said. 

Last week, people were shocked to learn hundreds of fish and eel were seen gasping for air at Lake Grounds following a period of low oxygen in the water. 

An outbreak of blue-green algae and a hot, dry spell caused levels to drop dramatically which caused the deaths. 

A similar occurance in 2016 meant an ultrasonic algae control machine was fitted to control the flares - this had been successful until recently. 

However, last month the machine was tampered with and a new part was ordered. But it is now currently 'stuck in customs'. 

A spokesperson for Portishead Town Council, said: "Unfortunately, the infestation and dry weather caused a sudden drop in oxygen levels which led to the tragic deaths.

"The algae has turned brown overnight, which means it had killed itself, and this then had a major impact on the fish and eels.

"We were alerted to the situation and immediately contacted the owners of the lake, North Somerset Council.

"More than two hours was spent pumping water back into the lake which thankfully brought the majority of fish and eels back to life."

"As of Monday, September 26, oxygen levels at the lake are now back to normal."

However, ammonia levels in the water are still high. The Environment Agency is now monitoring the situation.

The spokesperson added: "We would like to thank Ham Green Fisheries, of Pill, who attended Lake Grounds over the entire weekend to help recirculate water to oxygenate the lake. 

"Our thanks are also extended to the RSPCA and Portishead Fire Brigade for all their help over the last few days."

This comes after an outbreak of bird flu caused the deaths of many birds at the lake this week. The council says it will continue to monitor the situation. 

The Department for Environment, Food and Rural Affairs (DEFRA) advise anyone who spots a dead bird to report it on a helpline which can be called on 03459 335577, extension seven.