Have to worry about take-over by the aquatic plants, especially invasives like Water Hyacinth, which is not currently approved for introduction by DEP because of its devastating effects in the southern U.S.
	Usually most effective for small lakes or ponds; would be most effective if used with Biomanipulation, as it also provides cover for zooplankton
	In order to prevent take-over of native species, must harvest, which is labor intensive