I know this is an older thread but I just wanted to know why someone mentioned to add gravel or a sponge into the cup with the java moss...
will any type of moss work like this?
Will it grow faster this way than say in a low light no CO2 tank?
That way it has something to latch on to. mine grow better attached to something than free floating.
all moss's have different growth characteristics. I imagine that most will be able to grow in a jar on a windowsill.
mine grows fastest on the windowsill, but it depends on how much sun your area gets.