I had a koi pond at my old house and I always like the floating plants. I thought it would be nice to put a couple in a pot/bowl on my outdoor dining table. My question is, how much fertilizer do I need? I am hoping to just use a standard plant fertilizer (like Miracle Grow) I already have and dissolve it in warm water. I know there are a lot of factors, but any guesses as to how much to use in a gallon of water for a water hycanith and a water lettuce and how often to add it?