Hi, it looks very nice.
What sized tank is it? I would also hide the heater but I know its not always possible. What other plants do you have in there? If you have valisineria (sp?) go easy on the flourish excel as the plant will melt (dissolve). There is also another option for feeding plants depending on what they are and that is to use some fertilizer balls which push into the gravel at the base of the plants. They are really good for plants which take up food through the root system, however you do have to be careful when cleaning the tank not to disturb them as they can turn the water muddy looking (temporary).