Science & Environment How long do algae last in water? March 3, 2026 by Tanp | Leave a Comment Algae can last in water for varying lengths of time, from a few days to several months, depending on the species, environmental conditions, and nutrient availability. Some microscopic algae species form dormant spores that can survive for years in sediment, while larger algae blooms might dissipate within weeks. Understanding Algae Lifespans in Aquatic Environments The […] Read more ยป