Black algae all over tank after 6 months
I started a planted tank with Monte Carlo. Everything was fine till first 4 months and the carpet was also coming up well.
But after that black algae started to come all over the substrate and leaves.
I tested my tank for phosphates and its zero. Still used sechem Phosguard as it removes silicates as well.
Not sure about nitrates but I do a 60% water change every week.
I also use pressurized CO2.
Also, I have 2 small tetra , 2 siamese algae eaters and 4 Amano Shrimps.
Any help or suggestions are appreciated.
Thanks.
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