Hi, I would like to ask, when is the best time to put in corals, and fish for a Saltwater tank.?

Providing that you have used live rock when setting up your aquarium, and your levels read as follows Ammonia - less then .1 milligrams/litre, Nitrate - less then 20 milligrams/litre for reef tanks, Nitrite- almost undetectable. Your Aquarium should be ready for fish. Any fish that will eat flake food is acceptable, but I would recommend that you avoid damsels. They are very hardy but also extremely aggressive. You should not try corals for at least a year. After about six months of fish, it would be safe for zooanthids, gorgonians, mushrooms and sponges.

If your a beginer keep claer of live coral till more experienced as they are very demanding on water quality. the best starter fish are those which are called nitrite hardy such as damselfish, chromis and some clowns. tangs and surgeon fish are the next hardiest. you can buy the bacteria in petshops to get your tank going, dont add any fish until the nitrite drops to a safe level. and add fish gradually as not to over load the system until its established. i assume your just starting so i strongly recommend investing in a few good books before even puting water in the tank. also check www.geocities.com/tony2kuk/aquarium.html as a starting point

depends,do mega research. Most of that stuff need extreme lighting. also depends on what size tank, if starts from a nano tank and up, your best bet is to look up www.maast.org i believe that it the best sight that can help you