How Do Goldfish Lay EggsMake sure these types of plants plants with roots in water and leaves above are planted in a neighborhood of fine, but not strong water movement. This guarantees that they will do their job as plant filters. Other plants equivalent to lilies and hyacinth are outstanding for nutrient removal too, but not at the rate of iris and similar plants. They are useful for shade, so that you can slow algae growth UV STERILIZATION. Although not always necessary in a well planted, well shaded, well filter aquarium; they’re still very useful. UVs help with algae control, ailment prevention, and the Redox advantage that’s vital for fish health and proper filtration.