cycle stuck

[Gabeorguss]

hello I have just started a new saltwater tank it is a 5 gallon soon to be nano reef. i started a fish less cycle and it has been stuck at ammonia 4.0ppm for a week now the nitrite is at .25 ppm and nitrate is at 5ppm has been like this for an extra 2 days. I did the shrimp from the super market to feed ammonia as I saw from YouTube. I have cycled freshwater befor just fine I have 30 gallon and 2 5 gallon freshwater tanks that I had no problems with. I started my tank with premixed saltwater live rock and live sand. please help I want corals lol.

 

[Sniperhank]

Ok, so in a 30 gallon tank how much rock and sand are in the system?
That is a ton of ammonia. I accidentally overdosed when I cycled my old 55 tank and it took forever for it to get where it needed to be. I either recommend dosing to 2 ppm or simply using the cocktail shrimp method.