I started my 30g tank 5 days ago. I have 25 lbs of live rock and 20 lbs of base rock in it. I put a dead shrimp in it. a quite big one chopped in 3 parts cocktail shrimp size. My ammonia reading is 0.50 ppm. I wonder if I didn't put enough shrimp in there? Or can I expect it to raise more? Not that i'm in a hurry, but I don't want a mini-cycle.