Why is my pond green?
Water that is green in color throughout the water column is often affected by blue-green algae. To reduce this type of algae you should practice environmentally safe lawn care practices, but you can take it a step further and apply through the Adopt-A-Pond program to install barley straw. Barley straw acts as a nutrient source for micro-organisms that outcompete blue-green algae and therefore help the water to be clearer. Interest in barley straw has been high and limited funds can affect the amount of barley straw we can distribute. To determine if your pond is eligible for barley straw, contact Environmental Resources.

If you have a green mat on top of the water that tends to move frequently with winds and rain, then you probably have a healthy population of duckweed. Duckweed is a plant that is a food source for water fowl and actually helps with the water quality of the pond by removing nutrients. There is little you can do to remove the duckweed and it is unadvisable since this plant provides food and habitat for several different species.

Another reason your pond may be green is due to filamentous algae. You can tell if there is filamentous algae because it forms in clumps and has a hairy like appearance. By practicing environmentally safe lawn care practices, as mentioned above, you should be able to cut back on the nutrients entering the water and eliminate the food source for the algae, which should eliminate the algae problem. For further information about what you might be able to do to help your pond or wetland, check out the Adopt-A-Pond information pages.

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1. There is a small metal tag attached to some trees in my yard. What does that mean?
2. I passed a development and saw some silt fence down near a wetland. Who should I contact to get it fixed?
3. What is buckthorn and how can I manage it?
4. We have a pond/stormwater basin in our backyard. We would like to have a dock and a canoe so my kids can fish. Is that possible?
5. Does the City treat my pond for mosquitoes?
6. Why is my pond green?
7. How many trees do I have to plant on my lot with a newly built home?
8. What should I do if I see pollution going into the storm drain or in my pond?
9. What can I do to improve the water quality in Lakeville?
10. I have a group that is interested in volunteering. How do I find out what opportunities are available?
11. I have a tree in my backyard that looks sick. Who can I contact to determine if it is diseased and if there is anything I should do?
12. Where can I purchase native plants?