Hello all I have had my 200 mixed reef up and running for 5-6 years. I am looking for some help. I am having a problem with some of my corals bleaching. My ping hammer and my brain coral specifically. My water tests good (alk.Ph.Phos.Amononia.calc.nitrates.nitrites.). I am perplexed. Have had my lobo for 5 years so I would like to save it from bleaching. Any ideas? OH water temp did get up to almost 86 during the heat for a couple days before I caught it. I did slowly get it back down to 79.