I have a 45 gallon cube, media reactor with phosphate,with I would say 25 pounds of live rock and live sand. Livestock: Flame Angelfish, Yellow Tang, Pajama Cardinal, 2 Maroon Clownfish. Coral: Hammer, Meat, Duncan, Xenia, Zoanthids, Green Brain, Acan, Star Polyp. I was thinking about setting up another tank and I know that Bio-Balls aren't the best but was wondering what the ideal/best sump filter media would be. I didn't know if I should throw in some live plants in the sump as well, just curious what's the best out there. And say if I just had fish, what would be the ideal media for them.