[karimwassef]

So, if my theory above is true, then I think restarting the tank with the same sand and rocks (especially sand) will always generate the same dinos. The same source of locally available nitrogen gas and a seed population of dinos will restart the process unless you introduce a competing nitrogen fixing agent- like phyto - in such excess, that they limit the dino explosion.

One way to prove this theory is to remove the denitrifying elements as much as possible or pass their output through a chamber to export the nitrogen gas before returning to the tank. Basically, this supports removing the live sand completely as a potential solution.