Water Clarifier: When properly applied, this water clarifier will effectively coagulate and flocculate a wide variety of suspended solids. A biodegradable clarifier for lakes, streams and ponds. Certain species of fish may be killed at application rates recommended on this label due to gill plugging. If the water to be treated is extremely turbid, extend the application time to reduce the chance of larger particles plugging the gills. Allow sufficient time for the fish to move into untreated areas.