An update on the tank. Algae seems beaten. I took the main light off. Just two fish in there... a tomato Clown and a ternate damsel. The yellow coris wrasse died recently. Honestly, I made some bad decisions accepting free coral and fish. It costed me in terms of pest and disease.
A free frag isn't a problem. A whole tanks worth is hard to judge unless you know the tank or really trust the person. Especially if the tank has had problems before