I have these hard algae’s growing on glass and on rock wondering if it’s coraline or something else
my main worry is the really dark hard stuff
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Mess with it.I’m scared to mess with it salty do u have any idea what it might be
Coralline comes in many shades and colors, and one of the fastest growing encrusting coralline species likely to be encountered in aquaria are green in color and may make you think you have a type of nuisance algae growing on your rocks. You can distinguish green coralline algae from film algae by testing its hardness, coralline should not come off easily when toothbrushed. Fast growing green coralline algae usually takes up residence on bare rock, and is often later engulfed by epiphytic coralline algae that have "better coloring" like reds, pinks and purples.