Quote:
Trickle filters frequently carry a higher nitrate load because waste products get trapped in the media and do not break down fast enough.
Can you post an updated picture?
And this quote makes no sense to me. High nitrates are the result of inadequate bio or mechanical dinitrification. The time fame in which organics brake down to nitrates will be harmful only if they break down to nitrates faster than you achieve dinitrification resulting in high nitrates