What is it?
Mustard algae is a chlorine-resistant form of green algae that often resembles dirt or sand on bottom or sides of pool. It contains compounds that act as a defense mechanism against the oxidation efforts of sanitizers, helping it survive even in highly chlorinated conditions. This factor can even create a large chlorine demand in certain situations. Mustard algae can be brushed away very easily, but returns quickly.
To kill mustard algae:
- Use Banish® as it kills all types of swimming pool algae
5 steps to prevent algae growth: