Hello everyone, newbie here. Although my angelfish is still eating & active, I'm extremely worried about him. This is the 3rd day of this kind of poo. Any ideas what is could be? He's in a 60 gallon tank with his mate and a bristlenose. No new additions to the tank since set up in 2017. Am0. Nitrite 0, Nitrate 2, temp 79. It's planted. Thank you.
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