Hi Anirban, what a journey. Like your perseverance . I also constantly battle 0 Nitrates. I have turned to dosing Seachem Nitrogen Flourish but do it manually and only when it goes back to zero. I add a capful (200gallons) and it rises to about 2ppm. When my NO3 gets to zero (Salifert) and I have some PO4 (some meaning 0,02 or lower in Hanna ULR phosphorus checker) sometimes I get cyano.
I have noticed that you dose AF Energy and AF Build, but have not seen you dosing AF Aminomix neither AF Vitality. Any reason for this? Also, have you switched entirely from the zeolites to AF Life Bio Fill? What is your experience with these? As I understand each should do different things as zeolites typically absorb amonia directly from the water before it breaks down into Nitrites and Nitrates, while AF Life Bio Fill seems to be just another filter medium such as Seachem Matrix or syporax, used to house nitrifying and (potentially) de nitrifying bacteria.... Even though each does a different thing both deal with nutrients at different stages so.... which do you recommend based on your experience?