A few spots of algae appeared. I thought nothing of it. Then, it bloomed, and is now all over the rocks. It isn't 3D, but it is dark, and unappealing, if you look from the top. Same with the sides. How do I get rid of it?
Do you know what color the algae is? Is the tank newly setup and how long ago? Also what types of lights are you using?
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Have you tried to reduce the amount of lighting you have (hours on, or the PAR)? Otherwise are you able to remove it with a sponge underwater or is it more “stuck on”?