Instructions
Timing of EM use
How often should EM be used?
Every 4 weeks during the pond season for the first year, so that the microorganisms in the slime become dominant and suppress the decomposing bacteria.
If oxygen-depleting organic slime is converted to a health red-brown odourless slime, the EM treatment can be reduced to 3 – 5 times a year.
If the aim is rapid slime decomposition with Effective Microorganisms, treatment can also occur every two weeks. Use in 2 week intervals is very intensive and can only be performed if the stocking level is low, because oxygen depletion in polluted ponds could be too extreme otherwise.
Quantities and average frequency of use:
Quantity per ha.:
100 l EM-Active
10 l eMB Starter
Quantity of 5 ha. and more:
80 l EM-Active (per hectare)
10 l eMB Starter (per hectare)
Quantity of 10 ha. and more:
60 l EM-Active (per hectare)
10 l eMB Starter (per hectare)
Instructions:
Mix EM-Active and eMB Starter with water then dilute so that the solution can be optimally used on the entire pond surface. Mix the specified quantity of EM-Active and eMB Starter with pond water at a ratio of at least 1:5 and spray on the pond surface. Warning: Do not reduce the quantity of EM-Active and eMB Starter!
Additional annual treatment:
10 kg Slime Balance per ha. weighted down in bags (as Slime Balance Bags) or allowed to sink to the floor loose.
EM to remove slime and odours
In the case of massive slime occurrences, organic slime or strongly smelling slime, apply a special treatment (see above for quantity) to the pond every 1 – 2 weeks.
In spring and autumn apply about 200 kg of Slime Balance per ha. Apply Slime Balance on the entire pond surface and spray EM solution on the pond surface. The Slime Balance will sink on the mud. This treatment also works very well over the winter season.
Important information:
This treatment is so intensive that it can increase oxygen depletion in the affected pond. Therefore it can only be performed when the pond is not too intensively used for fish breeding. In the case of fish breeding, there must be four-week intervals between treatment.
ermanent pond treatment with EM-Dangos
Formulation 50-60 fist-sized balls:
- 20 kg Biolit rock meal (alternatively: Diabas)
- 1 kg EM Ceramic Powder
- 5 l of EM-Active (EMa)
Manufacturing:
mix well and form fist-sized balls. Place them at least 2 to 4 weeks without direct sunlight in a well ventilated place (e.g. roof or loft, garage), ferment for at least 15°C, until they form brown-black dots. After a long storage, they also develop white mold, similar to the white mold in cheese production.
Application amount:
- in smaller biotopes:
1 Dango/m2 - in lakes from 400 to 500 m2:
1 Dango / 4m2
Frequency of use:
depending on the pollution
- for swimming ponds:
2 to 3 times per year in areas of shallow water and plants zone - fish ponds with sludge:
2 to 3 times per year distributed evenly in the pond

