Red Algae, Rhodophyta

Causes:
- Excess water circulation and filter.
- Excess of Fe in hard water.
- Lack of CO2.
Difficult to find out why they appear.
 Solution:
- CO2 addition.
- Reduce filter circulation.
- Reduce Ph and Gh carefully.
- Cut leaves with algae.
- Some fish help like Crossocheilus siamensis