i could only get mine to grow when i put it under a shelf where it was almost completely shaded. It was by the glass so i think it was getting it's light allowance from the reflection off the glass. I've got 8 bulbs over a 12" deep tank thats only 24" wide so there are no medium or low light areas in my tank what so ever
I got tired of my clowns dumping sand all of over it so i sold my colony to Neo...