I only have a color changing light at the bottom of the tank. It's on the whole time I'm awake. I do have plant fertilizer stuff that I add weekly like it says to. I just had to do a massive water change because the water was gross. I slacked off around my 3-day weekend at home and my water showed it. My test kit is at home at the moment, and it will be picked up over thanksgiving break. I'll make sure I don't forget this time. I just did a big water change, so the levels better be good, or we got a problem with tap water. I did two 50% water changes back to back because it was so nasty. I have a hypersensitive nose, so I have something to go on. I did one 50% water change yesterday after I had a Cory clock out on me just to make sure he didn't mess up anything, which was my great discovery of crappy water. He was the only one not well, so I doubt it was the water. I had added the stuff a couple hours before he clocked out and was told not to re-add it after the water change. I have bamboo and this plant in there.