Shrimp farming is closely tied to pond water quality, which serves as the primary medium for shrimp growth. Good quality water supports healthy development and helps farmers reach their production targets. When water quality declines, it can trigger multiple issues from stress to disease outbreaks. This is why regular monitoring is essential.
To assess water quality, farmers need to consider physical, chemical, and biological parameters. However, many still rely on visual assessment by observing pond water color because it’s seen as a quick indicator of overall condition. While visual checks are not sufficient and cannot provide complete water quality information, they can still offer early signals that farmers can use to guide daily decisions.
Assessing Water Quality Through Pond Color
Visually, farmers can observe two main parameters: water color and clarity. Below are common pond water colors and what they indicate.
1. Light green
This color is caused by the dominance of Chlorophyceae phytoplankton, commonly found in the early culture phase when organic buildup from feed is still low and phytoplankton are actively growing. This water is generally good and can be maintained.
2. Green
Usually appears as light green water becomes denser, indicating an increasing amount of Chlorophyceae. This color is still safe and can be maintained.
3. Dark green
Commonly seen from around DoC 80 until harvest. It is caused by high organic accumulation from uneaten feed, which fuels phytoplankton growth. Over time, Cyanophyceae (harmful to shrimp) may dominate, so water exchange is recommended.
