The Importance of Pond Water Color

The color of pond water is a powerful indicator of overall pond health. It reflects the balance of organisms, minerals, and biological activity within the ecosystem. In aquaculture—especially vannamei shrimp farming—certain water colors such as brownish green and dark green often signal ideal growing conditions. Still, color alone isn’t enough; it should always be evaluated together with key parameters like pH, dissolved oxygen, and water temperature to ensure a stable environment for aquatic life.

Which Pond Water Colors Are Best for Vannamei Shrimp?

✅ Brownish-Green Water

A brownish‑green tint usually indicates a healthy, stable population of phytoplankton. This balance supports vannamei shrimp by producing sufficient oxygen through photosynthesis and maintaining a strong pond ecosystem. To keep this color consistent, regular weekly fertilization is recommended. Good aeration is necessary to keep water in good color.

✅ Light to Moderate Dark Green

A non‑concentrated dark green color also suggests a well‑balanced phytoplankton community. This is another favorable condition for shrimp culture. In this case, only minimal fertilizer is needed, along with routine monitoring to maintain stability.

⚠️ When Water Turns Deep Dark Green or Dark Brown

Very dark green or brown water often signals harmful phytoplankton blooms, which may feel slimy and can produce toxins. These blooms reduce oxygen levels and pose serious risks to shrimp health. When this happens, corrective actions such as partial water exchange and applying lime can help neutralize harmful substances and restore balance.