After keeping cichlids for years I thought i'd get rid of them and try a marine set-up. Had the tank set up just with water and sand in it for a week or two before i got impatient and just had to put something in it. Got two damsel from LFS and put them in. Couple of weeks later added a Foxface Rabbitfish which broke out in spots the very next day. Asked LFS who gave me some tablets to crush up and put in tank. About 3-4 days later water started to turn red and just got darker and darker. I don't know if its the tablets, the rocks i have in there or the sand. Its now been red for about 3 weeks and isnt showing any signs of improvement??? Has anyone had any similar problems?