So I have a standard 55 gallon with some rock and driftwood and two java ferns. I use flourish excel every other day and flourish root tabs. I just got a 48" aquatic life t5 HO fixture with a 6000 k bulb and roseate bulb. The fixture has been on the tank for about 3 weeks now and the plants haven't really done anything except green up a little. Not really sure why thre not taking off considering they are one of the easiest plants to grow. Any help would be appreciated