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Melinda
I currently have two types of algae in my aquarium that I would like to identify:
1) Red, possibly cyanobacteria, but they are difficult to scrape off the stone
2) Brown, with a similar level of difficulty in cleaning
There is also a third something that is clearly not algae, but I can't say what it is.
In short, I can clean everything mentioned above with a toothbrush, but I would like to know exactly what I am cleaning.