OK so i'm pretty sure the rock i got was in a tank that was treated with copper.
I believe this was 2 years ago and the rock has been out of the tank and dry for a year before i put it in my tank.
I have a starfish, cleaner shrimp, and various CUC that are doing well. The cleaner shrimp has molted twice and has trippled in size. They have been in the tank for 5 months. Corals seem to be doing well too got some good growth, polyps extended. Some seem to be not doing as well as others though, like my zoas - i got good growth in the beginning but then now i think they are slowly melting away and some dont seem to open all the way, only half way. not sure if that is the recent change in lights or could be the copper from the rocks. Maybe there is very little trace amount of copper in the rock so not too detrimental to the health of the animals but big enough to stunt their growth overtime and maybe that is why i dont have any coraline growing.... I think that is why i get good growth when i first introduce the coral but then it growth slows down due to the copper over time.
What do you guys think? I really hate to have to shut the tank down and start over... Tank is pretty full now and all my hard work will go down the drain.
If i do start over, is everything contaminated now? Do i have to get rid of everything?? OR can i just throw away the rock?