Great. So we are using the shrimp method to cycle the tank. The best and easiest method IMO
So, how much sand and rock is in the system?
With the shrimp rotting in the tank, it will be providing a constant supply of ammonia as it decomposes. This is what makes it easy, no need to re dose ammonia into the system when the levels drop.
Also, stop adding anything to the tank. There isn't a need to ever dose anything into your system unless you can prove it is needed, and IMO
only if water changes are unable to resupply said level. Since it is stability, it could also be holding back the process you are trying to have happen.
So, just leave the shrimp in there to rot. Leave it. Walk away for a couple weeks. Come back and see where your levels are. It really isn't about your ammonia, we know that is there. We want to see your nitrIte and nitrate levels being consumed in a 24 hour period. And if there is a shrimp still in the tank rotting, you want to see all of them reading 0 at the same time. Basically.