how much algae would be bad for the tank?

Carmen

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One of my tanks receives a lot of sun light during the day, and it has quite a lot of (black?) algae.
I just wonder when does it start to become a threat, how much can still be safe for my fishies and plants?
 

connorlindeman

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One of my tanks receives a lot of sun light during the day, and it has quite a lot of (black?) algae.
I just wonder when does it start to become a threat, how much can still be safe for my fishies and plants?
Could you post a picture of the tank, so we can identify the algae?
 

Colin_T

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post pictures before cleaning so we can ID the issue. It might be true algae or blue green algae, which is actually a photosynthetic bacteria.
 

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