My lace plant has stopped producing new leaves and the existing leaves are slowly starting to get old and rot. I know aponogetons go through a dormant phase. Is this it? I've had it since last September, and it's consistantly produced two or three new leaves every week until about a month ago when growth suddenly stopped. I haven't changed anything - if anything conditions have got better, since I introduced more flow, better CO2 diffusion, and more stable CO2. All my other plants are thriving. Should I take it out of the tank and dry it out, or should I just leave it there and let it do it's thing?