Anyone know what these lines are in the H'ra leaves?
+1. I am also curious about this, as I have noticed a few of these on my H'ra. I assumed either damage due to fish, or maybe a nutrient def leading to increased fragility, as my tank is low tech and I don't measure all the micros, but your tank seems to be in top shape and still getting some. I'm interested to see if anyone else has experienced this or has any insight.