Cyanobacteria or blue-green algae (BGA) is often caused by a combination of deteriorating plants, excess organic waste at substrate level and poor flow or poor oxygen levels. Read on more to find out what causes cyanobacteria in aquarium and how to get rid of BGA in planted tank.
There is a difference between green spot algae (GSA) vs green dust algae (GDA). Green spot algae forms distinct circular dots that are very tough to scrape off while green dust algae is easily wiped/scrapped away. GDA forms much more quickly than GSA.