In my system concentration of ammonia, nitrate, and nitrite is 0, 10, and 0ppm respectively continuously for three weeks. It occurs after introducing the fish in a tank. Before introducing the concentration is 0. 25, 100 and 2 respectivly. My veges are all died.
What is the reason behind this?
The system temperature is 19. 5 to 26 deg. Centigrade
And pH is 6. 5 to 6. 8