sorry i dont know what "HO, or NO" is. I have CO2 running in the tank. The cabomba's huge. im afraid to trim it, as from what i hear it die's from the cut down for the most part. I have about 1/5 part flourite, and liquid fertilizer. Anyone know of some fast growing plants i can just trim and replant? some fast growin stuff? I was thinkin about getting some rotala. Any carpet plants that carpet quickly? dwarf sagitaria, dwarf baby tears, dwarf hair grass?