Hi i will have a 20 gallon tank with corals and fish, a Occelaris clwonfish, pajama cardinal, mandarin dragonet, yellow watchman goby and a coral banded shrimp. The corals i will have will be a hammer, pulsing xenia, monitpora, zoanthids, and some others maybe. I am planning on feeding them with "rods food" which apparenty feeds your fish, inverts, and corals all at once. The problem is i dont know how much to feed each fish, and if i need to feed the corals by putting food on them or something. any help would be appreciated