I just started a seedling in a soil medium (FFOF). The container is a one gallon milk jug. The seedling is three weeks in and doing fine. However the milk jug is opaque and must have let in enough light for some kind of green mold or something like that to start growing, as on the sides (inside of the jug) there is something green growing. There is nothing growing on top of the soil, so I'm thinking whatever it is, it can't handle either direct light or fresh air (possibly both). So far the plant seems OK, and it doesn't seem to be having effect on the pH balance (From checking the run off). If it's some kind of mildew, will Capstan get rid of it? I have a paper sleeve taped around the jug to see if that helps get rid of it. Any ideas?