Once again, research the specific range your desired plants are able to tolerate. Water temperature-Though most aquatic plants do well within the temperature range of 70 to 80 degrees, there are several aquatic plants, such as Anacharis and Japanese Dwarf Rush, that prefer cooler water temperatures.oster & Smith Educational Staff Anyone who has seen a photograph of a lush, verdant setup with a school of jewel-like tetras knows the beauty of a freshwater planted aquarium. But many hobbyists avoid adding live plants, believing they are too fragile or too difficult to keep.