root discolor

hey all, I have a buddy who is using straight compost (little amendments added) and they did not do a good job of aerating with additional perlite or chunk perlite or anything. I believe he has a root rot issue as there has been lots of wilting (2 plants have been killed off) and he is also...

i have a clear container that my plant is in and there is green moss looking shit on the inside wall of the pot. Is this bad? I'm using a teaspoon per gallon of molasses if that would have anything to do with it? I'll take pics ASAP Thx