I purchased about a fist full of chaeto for my refugium about 4 weeks ago. So far it hasn't grown any and it's been breaking into little pieces everywhere. I have it under a plant bulb that I got from home depot about 75 watts I think, but it's specifically for plant growth. My nitrates are around 20ppm and I had a green algae outbreak probably due from high phosphates. What am I doing wrong, with high nitrates and phosphates that stuff should be growing like crazy!! I run my refugium lights on reverse cycle. Do I need to add more chaeto, how much do I need?