110gal, about 150lbs LR, set up about 4 months ago, have refug with 20lbs miracle mud and a very thick bed of 3 types of calurpre. do about 20 gal water change every week. have auto top off so salinity is very constant, the last couple weeks my nitrates have been about 10-15 but everything else is 0. a few corrals; galaxia, frogspawn, candycane, kenya trees, spaghatti coral, zenya, orange and purple monopora... something or other? toadstool, pagoda cup... and fa few other little frags that i'm not sure what they are,, some mushrooms and zoas... all those are thriving, doing awesome, no problems at all ever! but the fish... OMG... I have never in any tank I have ever had, had half the problems i have here... started off with a flame angel, scooter blenny and cleaner shrimp...added a small dejardanii tang, it died, the flame died, cleaner shrimp died. slowly a few more fish, a few deaths, eventually i wound up with a powder brown tang, two yellow headed sleeper gobies, scooter blenny, ember blenny, falco hawk, corral beauty, mandarian blenny, corase wrasse, cleaner wrasse... think that is it... everything was looking great and doing awesome. went on vacation for two weeks and my buddy who is way over the top into reef tanks and aquariums. (he has a business setting up and maintaining tanks) so pretty much knows what he is doing... watched my tank and few the fishies while i was gone. i guess at some point ick broke out and got the tang sick, he ran almost an entire bottle of kick ick thru the system... the tang got some color back and was starting to look better but died on thursday, then my flame angel started looking hazey eyed and white spotted and one sleeper goby was MIA and the other was acting not normal and the mandarian was MIA.. now this morning the yellow head is laying on the ground about to go, haven't seen the corral beauty yet... pretty much almost every fish I get eventually winds up with parasites or ick or fungus or something. At one point or another I have treated the tank with Rubys bacteria treatment and with KICK ICK, i've tried doing more frequent water changes and feeding food soaked with ginger and garlic... they just keep dying!!! I am almost to the point i am ready to get rid of the whole thing.. breaks my heart cuz it is beautifull!