Can't grow a decent moss wall
I've made a moss wall, consisting of two sheets of black plastic guttering mesh sandwiching various types of moss, stuck onto the back with suction cups.
It's been there for more than three months, and I'm still not seeing satisfactory levels of growth. The moss seems to grow much thicker attached to driftwood, and certainly isn't attaining the dense carpet effect I had hoped for.
The tank specifications are in my profile.
What am I doing wrong?