Hello everyone, I am new to saltwater tanks and I have a couple questions. First, I have a 20 gallon tank (I know that will greatly impact the fish I can buy) and I was wondering how long it takes before I can start adding fish. I have quality test kits and was wondering how often I should test the water. I have read a few different things about how to start it up and I have sand and live rock in there right now. Was that the correct thing to do? Also, the water itself looks pretty good but the sides of the tank are pretty cloudy. Is that normal?