
Hi I am new to reef keeping but not to marine hobby been doing it for over 4 yrs now. anyway about 6 months ago I bought a favia brain coral that was doing very well, but about 2 months ago I got lazy and fell into some bad husbandry techniques now the coral has a brown spot covering half its body, is there anything I can do to make it healthy again. I have a 72 gallon bow with 80lbs live rock and 4 1/2 watts per gallon of light using t5's. my ammonia is 0, nitrite 0, nitrate 5, ph 8.3 and calcium 400ppm.