Hi guys just started my 5 gallon tank. The pet store gave me water that they used in their tank that's been cycled to put into my tank. How often should I do water changes. I currently have a live rock in there and snails with 2 damsels. Should I not have any livestock in there? Worker said it was ok because I was using the water they use for their fish. I also bought bacteria for the tank and was told to add it daily to build bacteria. Any thoughts? I need help!!