General Freshwater Forum
The water in my school's tank recently became milky white, as such:
Nitrite & Nitrate: close to 0 ppm
Temperature: 25 degrees C
pH: 6.5 (usual ~7)
kH: 50 (mg/L)
gH: 90 (mg/L)
It became like this all of a sudden. The tank water was clear for a month.