u/Away_Summer_3463

I have one betta, live plants, and snails in here. I noticed this yesterday. Anyone know what it is? I checked the levels yesterday when I saw and the levels were ~20 nitrate, 0 nitrite, ~7.2 pH, ~80 carbonate hardness, and 180 hardness (but read bettas can adjust to the water hardness). The temperature is also around 77-78 degrees.