The composition of black muck (organic matter) varies a little depending in what part of the country your pond is located. From our research we have learned what is in black muck and the approximate percentages.
- Cellulose 45%
- Lignin 20%
- Hemicellulose 18%
- Proteins 8%
- Sugars/Starch 5%
- Fats/Waxes 2%
- Polyphenols 2%
Labile organic matter is decomposed quicker by microbes as compared to refractory/recalcitrant organic matter which is largely cellulose and lignin. These substances are fiber like and very slow to degrade. Cattails have a high percentage of lignin and may take years to degrade. Selecting the right pond bacteria to reduce black muck can be challenging due to protected trade secrets and the fact that not all bacteria/enzyme products work the same in every pond. Once a month during your application schedule take a minnow net attached to a longer handle and scoop up the organic sediments from the bottom. Look for signs that indicate more soil color than black color, thinner deciduous leaves, and less gas bubbles rising from the bottom. Do a smell test to check for hydrogen sulfide. Sometimes you will need to adjust the amount of product you are applying to the pond or change brands based on your observations and supported with a water test.
