Kualiti air adalah penting dalam penternakan tilapia.Perubahan sentiasa berlaku terutamanaya dalam system ternakan secara intensif atau super-intensif.Kualiti air umum diperlukan ialah seperti yang ditunjukkan dalam
Jadual 1 di bawah ini.
Jadual 1. Parameter kualiti air yang optimal bagi spesies tilapia O. niliticus (Rab,1089)
| Parameter | Julat | Unit |
| pH | 8.5 -8.9 | |
| Oksigen terlarut (DO) | 7.1 – 8.1 | mgL-1 |
| Suhu | 25.0 -31.5 | 0C |
| Alkaliniti | 268 -350 | mgCaCO3L-1 |
| Ammonia (NH3-N) | 0.1 -0.2 | mgL-1 |
| Total suspended solid (TSS) | 2.2 – 6.3 | mgL-1 |
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