I usually thin mine at that point, back to about 1/3 cover, and then let the process repeat.I would say currently it's covering c70% of my heavily planted Betta tank.
I'm guessing that the Betta wouldn't care either way, it is just <"a happy medium"> to have some surface cover, but also to allow light through to the submerged plants. I tend to use their (the submerged plants) appearance as an indicator of when to thin, but the bottoms of my tanks are always a <"dark and gloomy place">.ill thin mine out a bit later today.
Yes, it does.looks healthy