Why is there a sudden collapse of bloom after 30 days of culture?
For a healthy bloom to be maintained, it requires nutrients, carbon dioxide and sunlight. After around 30 days of culture the bloom develops heavily due to the availability of all three components. Due to heavy bloom the sunlight is prevented from penetrating the lower column of water thus leading to oxygen deficiency and death of plankton present in the lower column of water. This condition leads to collapse of the bloom.