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I know there are a lot of Sump / Refugium threads out there but I could not find an answer to my question. I need some clarification as well Please correct me if I am wrong but a Sump is just to increase water volume and a refugium is someplace that you can have good organisms growing without...

Hello, So I am making a mini reef or so I thought. I had everything set up and found someone who had some ex-live rock. He was giving it away. He had it in his tank for years and it was full of life but he let it dry out. He gives it to me saying that he cleaned them all. Now my tank has little...