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If light is too high for plant even with high [CO2] you can end up with pin holes in leaves followed by melting leaves.
Yes algae esp when leaves start melting with high light.
Some plants just don't do well in high light even with CO2
I think naturally really dark green leaves are a good indicator that a plant isn't going to enjoy a lot of light, however favourable other conditions are.
Plants leaves are really dark green because they contain a lot of chlorophyll, and containing a lot of chlorophyll is often because plants grow in low light conditions. If you have a lot of chlorophyll, and a lot of light, the excess light energy, (that has been intercepted) will begin to heat and damage the leaf tissue. It is back to Newton laws, the energy isn't lost it is just converted from PAR.
Bolbitis heudelotti and Anubias barteri are the two plants that come to mind as happier in lower light, but there will be others.
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