Hi! I just wanted to ask. The nitrite content in water of our Media Bed aquaponics is higher than the acceptable range of ppm, however the other parameters were desirable. I had check the possible reasons that might contribute to this problem. It might be the water spinach but found out that in some articles regarding about it says, it actually enhances water quality. I've been thinking it might be the condition of our charcoal filter. When does occasionally the charcoal need to change or replace?
Your help is highly appreciated☺️.