About Lesson
Fertilization level depends on Secchi disk transparency value
|
Secchi disk transparency |
Management/Control |
|
< 25 cm |
No fertilization; observe fish for signs of dissolved oxygen depletion; increase water flow if necessary. |
|
25-40 cm |
No fertilization; regularly observe the fish’s behavior |
|
40-60 cm |
Routine fertilization necessary |
|
>60 cm |
Routine fertilization is necessary; possible with an increased dose. |
Don’t fertilize the pond if:
- The exchange rate of water is excessive.
- Too much vegetation
- Too much aquatic vegetation
- Water is too muddy or dark-colored, and transparency is limited.
- Plankton turbidity is too high.
