i have 92 bow front tank <br>lighting .....2 radion lights ,1 marineland reef capable 36 inch<br>protien skimmer in sump , two koralia pumps <br>salinity.....1.023<br>carbonate hardness ......12 dKH<br>Calcium .......460mg/L<br>Phosphate.......25ppm/L<br>Nitrate........0.0 mg/l<br>Ammonia.....0.6mg/l<br>PH.....8.5<br>I change water 40% every two week sometimes three week .My corals are not very happy , they are not growing ,I have one yellow tang , sail fish tang , one maroon clown , one queen angel , one clam , though fishes are healthy and are there for more than a year. I never had coralline growing in my tank . Any helpful suggestion ?