i have some corals that has been in my tank for about a month. the tanks been up about 2.5 months. its a 120gallon with a 40 gallon refugium. i checked the water parameters and it seems fine, except my calcium is a little high. a week ago i had a coral beauty that i bought but couldn't get it to feed. it ended up getting ick. i couldnt remove it from the tank cause it kept hiding in the tank so i tried an ick medication called Kordon ick attack. really thick dark medication. after it was put in it got stuck on my sponge and that died. it turned brown a fuzzy. the other corals stop opening. it said it was reef safe. could it be because of the medication, the calcium? i did 3 water changes to within the last 2 weeks to clear up the water but nothing. im using tap water with some prime, or should i try water for the lfs? should i do some more water changes? oh i found out today my hammer coral fell apart as i shooked it. sorry for so many questions. still new, and need help. thanks