What all does it take out of the water. I have 90 gallon with a bunch of carnivores so I feed a lot of frozen foods which have a lot of phosphates so i could use something that absorbs them. What kind of lighting do they require. I would like to put some in my sump but how much lighting. Would a regular 20 watt N.O. work or would i need more. I would love some no matter what. Just let me know what you want me to do.