so i picked up a bag of ACTIVE FLORA and FLORA MAX today, might get another bag or two and some natural gravel to start a new project...currently equiped with a hagen glo 2x24w with life glo bulbs. what can i grow with that? what would i need to get to grow more light demanding plants, when do i need to get co2? my tank is 24x18x24h=41gallons, dont wanna get a 4 lamp it5, maybe a cf would be better for my lighting?