Sorry for your loss. I concur with ck, it is important to wait for 3 months or more. The reason is your bio filter hasnt been established so it canot proccess the amount of waist from the fish. Espesialy the amount of waist that come out of Tangs. There are also many forms of bacteria that help keep the fish healthy and disese free. These are all things we cant really test for with our kits. Wait for at least 3 months, then add your clean up crew first. Snails/crabs maybe a serpent star, then a small hardy fish like a few chromis or talbot damsels.