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I was just wondering if I can put dead coral in my fish tank?? And will it do anything?

I need some major help.. About a month a go I notice that I started having problems with my tank. Last week I did a partial water change to try and help it but now it's worse. My live rock has now turned completely black. The water has a greenish color to it. I'm not quite sure what I should...

My 40 gallon salt water tank has been up and running for 8 months. I have had a few minor problems but now I'm lost... My live rock has turned black. Tank fish are fine...Water is a greenish color to it. I have nothing but problems lately with live rock.. Do I have to have live rock in my tank???

I have a 40 gallon salt water tank. My water is starting to turn a greenish color. Last week I did a partial water change then is.. I can't figure out why the water is this color. All my levels in the tank are fine. The fish look fine too. Can someone please help me figure this out...

Since I put the protein skimmer in my tank and added a yellow tang my water has gotten cloudy. All my levels have been tested and they are fine. Can anyone help me?

I have a 40 gallon saltwater tank, everything been going great. I just have a few questions. I keep having red brown and green spots on the sand? What kind of protein skimmer is good?