Water parameters

Oxygen, pH, temperature, ammonia by species

Species

Oxygen is parameter #1: below 4 mg/L fish stop feeding, below 2 — fish kill. Lowest O2 — hot dawns (blooms consume oxygen at night). Night aeration in heat is mandatory. Ammonia NH3 rises from overfeeding and dead organics — sharply toxic at pH>8. Measure O2 at dawn, pH twice a week, temperature daily in summer.

Carp

O25–8 мг/л (мін 3)

pH6.5–8.5

Temperature20–28°C

NH3<0.5 мг/л

Hardy, but stops feeding below 3 mg/L O2