Reuben Page from the Environment Agency says that the oxygen levels in the canal are now back to normal.
The oxygen levels were affected by the recent warm weather, which the Environment Agency says usually only affects still water.
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A decision is expected today on whether to open new inquests into the deaths of the 21 victims of the Birmingham pub bombings.
A dull and damp day, with cloudy skies and further outbreaks of rain, locally heavy during the morning.
It will be a cloudy day across the West Midlands with showery outbreaks of rain, possibly heavy in places