Coral and mushroom

[txmk4]

Hello fellow hobbyists, I'm new to this I would like to know what of corals, mushroom colonies cover the rocks in the tank. I inherited a established tank (it was in a horrible condition) so far I have performed plenty of water change to bring it into a good condition, I have 1 coral beauty, 1 yellow tail demsal and 3 chromies, I bought 4 tangs but they all died last week due to higher nitrate level I was over feeding my tank. I would like to find out how would i go about adding more corals and fish in my tank with out the fear of losing any live stock. Any help or advice would be appreciated

 

[dstockwell]

Welcome to the Reef

What size tank.

 

[txmk4]

Welcome to the Reef

What size tank.

230 gallon

 

[dstockwell]

You need a test kit to know your parameter.

 

[ebushrow]

Welcome! As stated, we need test results, size you said was a 230 gallon, and if you have any live rock, sump, protein skimmer, etc

 

[txmk4]

Welcome! As stated, we need test results, size you said was a 230 gallon, and if you have any live rock, sump, protein skimmer, etc

 

[txmk4]

I believe this is the skimmer