New Sump BIG PROBLEMS!! HELP

[yellowworld]

Thanks, should i be worried about it continuing to leach into the water? should i pull the sump and change all the silicone? or should i just do a few heavy water changes? secondly how come only my corals have been effected by it? my fish and crabs and snails are all more then healthy, no breathing problems or loss of appetite and they are all still very active