Jovial Monk wrote on Sep 5
th, 2025 at 8:37am:
Quote:
"In 2019, after the last fish kill, which was cleaned up, the river was dead — effectively dead — for three years," Mr Shipton, the co-founder of the Friends of Anglesea River group, said.
"After a big rain event in 2022, which punched a hole in the sand bank at the river mouth, we had a tidal river for a few months and that allowed a lot of fish to come in."
But he said there was no knowing how long the latest incident could last.
Acidification, liberated sulphur all are suspected causes. Does it have anything to do with a now-closed coal mine that pumped groundwater from the mine into the river?
Seems keeping the connection to the sea open is the way to keep the river healthy, with pollutants, acid, sulphur etc draining out to the sea.
https://www.abc.net.au/news/2025-09-04/anglesea-river-fish-kill-event-water-envi...
Bad news. But somehow, but suspected causes are just that,
More form the story, not mentioned above -
"There is broad consensus that the exact cause of the deaths is one — or a combination — of three key issues: high acidity in the water, aluminium toxicity, or a chemical process called flocculation.
"There's a couple of things happening in the estuary that are affecting fish," Dr Clarke explains.
"One is those low pH — or acidic — water conditions, and they can directly affect fish by impacting their skin and gills."
So both high and low pH, don't they test the water?
"We're also seeing something called flocculation, which is where the particles suspended in the water can clump together and that can smother the gills of fish and impact their ability to breathe."
No mention of causes of flocculation. Not very scintific of them.
"And then it's also possible that things like metal toxicity could be impacting the fish, and some of those chemical processes in the water use up oxygen.
"That's oxygen that the fish need to survive as well."
Maybe. perhaps they need to research.
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