thought it was my ph due to brewing beer in basement where sump is,,,thought it was hydrogensulphide due to remote deep sand bed,,,but I guess it is something else? everything in my system has recovered and is thriving after removing the beer and remote sand bed but for some reason my hammer coral is back in decline after looking better for a day or two. this coral is large(50 heads) and is my oldest coral,I have had it for almost 10 years now,I would hate to loose it. any ideas what would only affect a hammer coral?