Does anyone know what this is? I've been trying to get it out for months and it annoying me. I've tried algae chemicals and adding more algae eaters to the tank. Do you think I should get a new substrate?
Thanks
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Does anyone know what this is? I've been trying to get it out for months and it annoying me. I've tried algae chemicals and adding more algae eaters to the tank. Do you think I should get a new substrate?
Thanks
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