Any way to make my Java fern grow?
I had a nice rock covered with Java fern in a heated but otherwise low tech, low-light tropical tank. I moved, the rock got thrown in a bag of gravel for a month, and it is now in a room-temp low-light tank. It's been there for 10 months. There are tiny leaves coming from the old roots, but they aren't exactly flourishing and have looked the same for about 8 months.
Is there a low tech way to make this plant grow? It's never been fertilized, but it's getting less light and less heat than in its previous tank. Is it really this slow in cool, dark conditions? Or do I need to start over?