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What is This Black Mucky Stuff on the Bottom of My Pond & How Do I Get Rid of It? – Pond & Lake Q & A

Muck Boots Stepping in Muck

Q: What is this black mucky stuff on the bottom of my pond and how do I get rid of it? - Several Customers

A: Over time, organics such as leaves, aquatic weeds or twigs fall into the pond and settle on the bottom. These organics slowly begin to decay and will create a mucky layer on the bottom of your pond. As time passes, this muck layer will get thicker and thicker. Before you know it, you’ll step into your pond and sink a foot down in muck. Muck is also a food source for algae and pond weeds. As the muck layer grows, so will your problems with algae and pond weeds. So how do we combat muck? Below are a few suggestions:

The best way to combat muck is to use a beneficial, natural bacteria called Pond-Clear. Pond-Clear is an aerobic bacteria that instantly activates when put into water and will eat away the muck at an accelerated rate. When used with aeration, you can see up to 3-5″ dissipate per year.

Just remember, any organic matter that goes into your pond will create more muck. The more muck, the more food source for algae and pond weeds. Finding ways to reduce the amount of organics going into your pond is a must. For instance, cutting your grass away from the pond, instead of directly in it or removing twigs and tree branches that have fallen into the pond using a Pond & Beach Rake.

One more way to reduce muck is to use a bottom bubbler aeration system. Aerobic bacteria, like Pond-Clear, will break down muck at an even faster rate when there is saturated oxygen levels in your pond’s water. Aeration also has many other benefits besides breaking down muck, such as clearing the water column of sediments, reducing the chances of fish kills or turnover and eliminating a pond’s thermocline. (Read more about the benefits of aeration here)

Controlling Leeches – Pond & Lake Q & A

Picture of a Leech

Q: How do you get rid of leeches?
- Richard of Waterbury Center, VT

A: The “muck” at the bottom of your pond is a great breeding ground for leeches. So the absolute best way to get rid of them would be to get rid of the “muck”. Pond-Clear Natural Bacteria is the best way to do this. Pond-Clear will eat up to 5″ of “muck” per year!

Another thing you can do in the short term is trap them. To do so, do the following:

1.) Start with a coffee can with a plastic lid.

2.) Poke holes in the sides of the can with a nail. Holes should be 1/8 to 1/4 inch in size. The nail holes should leave a sharp burr on the inside of the can (approximately 50 holes).

3.) Put about 1/4 cup of raw meat in the can (ground beef, liver, chicken or turkey giblets are recommended).

4.) Put the lid on the can and submerge it completely in your pond. A rock placed on top of the can will prevent it from falling over and will help prevent snapping turtles from tampering with it.

5.) Check the trap a couple of times a week and remove the leeches. Keep the trap in the pond until the leech numbers decrease, or you no longer catch any leeches in the trap.

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