I tested today; Ammonia O ppm, NO2 is O ppm and NO3 at 5 ppm.
I also performed 20% water change. All snails and crabs are doing fine. I have noticed a lot of Cyclops on the glass. My corals are going to enjoy them :-)
I am getting a few more snails tomorrow and possibly one Peppermint Shrimp too (I have one Aiptasia anemone growing and these shrimps are known for eating this kind of pest, lets test it)