green slime has started to develop in new pond. anyone know what this indicates?
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This is algae, presumably one of the green algae although they don't always look very green. As to what it indicates, well it always happens in ponds at this time year when the water temperature starts to rise, so I suppose it indicates that summer is here at last! It's quite easy to drag out of the pond if you don't like it but make sure you leave it at the edge of the pond for a few hours so that any water animals you've raked up by mistake can wriggle back into the water.
Lat/Lng: 52.1, -0.5
OS grid ref: TL0450