ECA Plus, an additive for aquatic plants, contains mainly organic acids from plants and ferrous iron, which can be easily used by aquatic plants. This new improved formula also contains additional magnesium, which is necessary for the formation of pigments during photosynthesis. Organic acids help stimulate the absorption of ferrous iron ions and give more green and red colors to aquatic plants. ECA Plus is also effective in preventing and correcting the problem of pale color of aquatic plant leaves.