I DID NOT PUT SAND, WATER, AND FISH ALLL IN ONE FREAKING DAY, NO SIREE BOB. I am insulted. Lol. I read a whole book on saltwater tanks and various Internet articles. I bought salt and live sand. I mixed it with tap water. I know. I shouldn't have, but I am not buying forty gallons of mountain spring water imported from who knows where. Besides, I don't even know where I could even buy that. I put in two bags of live sand, then some stuff to help the tank become less cloudy. I bought some live rock. I bought more. I got a shrimp and snails. The shrimp died in three hours. I found aiptasia. I bought Joe's Juice. I got rid of the aiptasia rock. I bought more live rock. Throughout all of this, I used my API test kit to test the water.