unhappy coral

Whats the reasons for unhappy coral.
I have a 20 g
hob
live rock and sand
clown fish and an enginer gobie thats going back(LFS guy said he would work great in a 20 g)
t5

water is spot on with peramerters and salinity phosphates are perfect.

 

list your params. don't say there "perfect". how much LR and sand do you have? What species of clownfish? What type of hob filter do you have and does have carbon, gfo, or a diy refugium?

 

Please post a good picture if your setup. A picture is worth a thousand words.

 

You also didn't mention what you have for flow.Is the hob the only source of flow?

 

The Hob filter has carbon
I have 10 lbs of live rock and 1 1/2 of live sand. I don't have my chart at theoment but the nitrites nitrates ammonia and phosphates were the lowest number on the chart and the ph was in the middle. I think 8.2. And I have a power head for flow. I will post a pic when I get home

 

Calc alk mag? We can help you much better if just start listing detailed specs. Everything from how old your tank is, to equipment, to lighting (you said t5.. what size fixture? how many bulbs? what kind of bulbs? what brand of bulbs?) to brands and types of additives, to brands of test kits.. and anything else you can think of. Your coral health can be related to pretty much anything that you have going on in your tank. And most importantly.. What types of coral? Lol.

 

the temperature of your water is also impotante.Did you check this before?

 

did you check the tempeature of the water before?