Just a side note on this.
In freshwater planted aquaria, you can turn off your lights for a planted
tank for a few days. In my experiences, it hasn't done any harm to the
higher plants, but the algae was strongly affected. I've gotten away with
leaving the lights off for 3 days. I chickened out and didn't go any
longer, but when I turned the lights on the algae had died back; I completed
a major water change of about 75% and the plants took over from there. I
purchased some Otto's and Flying Foxes and haven't seen a sign of algae
except for some green spots on the glass, since.
Dave Littlehale - knocking on wood
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