It's a relativbely new soft green, it's a slight nuisance, doesn't infest plants, so I give it a "C" rating like Green water.
Conditions are good for plants with these algae, but you still need to remove the algae that are there.
UV and scrubbing can help also.
Regards,
TomBarr










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="David"]does this reddish hard patch always at the waterline?.......if it is, its calcium buildup and its turn reddish due to collected stuff........[/quote:7c8e495c
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