Alrighty guys and gals! I’m brandy new to saltwater aquariums. Just bought the fluval evo 13.5. Put LV, live sand 1.5 inch and pacific saltwater for a week, added 4 snails and 5 hermits and a cultured live rock for the last 2 weeks and adding raw shrimp every 2 days. Ammonia has been holding at .25 on API “herd inaccurate” for the last 5 days. Is it time to add a starter fish? Nitrates and nitrites have been steady with 20 % water change every 5 days