Pond Boss Forums GENERAL QUESTIONS Muddy water Did I witness an algae bloom?

Your green planktonic algae is at a density capable of a fish kill when conditions are correct. Warming water and a few days of cloudy conditions or if the algae runs out of nutrients will result in death of all the algae quickly. This quick extensive death and the immediate algae decomposition will cause an oxygen shortage that could get low enough for to fish suffocate.