Hi All, I need some help and support ASAP. I just recently happened into a 30 gallon saltwater setup with a hang on back filter, 3 clown fish, 2 damsels and a gramma with sand substrate. I have never owned a saltwater aquarium before though I do have 6 freshwater tanks up and running now. I am wanting to know the best way to set up this tank including the type of filters, food, salt and water conditioners to ensure that these fish not only survive but thrive. Thank you in advance for any help offered.