It is important to first determine if you have an algal bloom and not other forms of aquatic plants. Once algae is confirmed, it will present as either filamentous algae, free-floating algae or blue-green algae.
Use a stick to break the surface of the water where the algal bloom is occurring. Look at the underlying texture. Also, take a cup full of water and surface material, then let it rest.
- If the surface scum is composed of many small free-floating particles with roots – It is not algae.
- Stringy or hair-like scum – It is filamentous algae.
- If the water is a cloudy green – It is most likely free-floating algae.
- A water surface with an iridescent green or blue scum will most likely be toxic blue-green algae. This must be treated with caution. Call RCI 1800 257 193 (Toll Free) for assistance.
To further identify the algal species, you can take a photo and email it to info@rci.com.au and we will attempt to assist with identification. Alternatively, you can send your sample to an accredited water lab for full identification. Contact RCI if you need assistance finding an appropriate laboratory.