for some reason that I am not seeing, your tank is either not cycled at all, or tests not reading right, even if a mini cycle, meaning the filter are not caught up, or BB disruption there should still be nitrate in the water. The fact that is none suggest the tank is not cycled at all, esp with the bacteria boom along with. I suggest you do not touch your filters for 6 weeks, do not add anything to the water. do 50 to 90% water changes every other day. until you start getting some kind of nitrate reading.
I agree and hence why asked about parameters. Looks like tank hasnt cycled, imo.