i have a 38 gallon tank ( 36 1/4L X 12 5/8W X 20H ) and i figure this would be so much cheaper than the 55 i was planning, since i already have a 30 inch light fixture (24" bulbs 2 actinic blue 12k and 2 daylight 10k bulbs 24 watts each) what could i grow with this light? i was looking to do some softies like mushrooms and leathers and zoas and stuff of that nature. i also have 70lbs of base rock and planning on getting 10- 20 lbs of live rock to seed. also i have about 70 lbs of sand that was used in my last attempt of SW. i know a skimmer is recomended and will help with nitrates but i have a good HOB filter that will make into a small fuge to help with that. can you guys make some suggestions for (a) powerheads?