To All of you that gave me such good advise in regards to my recent Spike in Nitrites..... I wanted to bring you up to date. I am doing the Happy dance now. All my levels have gone to near perfect. What finally did it we will never know but I moved all of my rock, cleaned under, around it all. I added more Nasarrius snails and Astrea snails as well as mixed Bio- live Aragonite into my live sand in tank and in the refugium, I did water changes (a couple gal ) every other day. I also reduced feeding and even took to spot feeding my emerald crab to reduce waste. Thank you all so much for your suggestions. IT WORKED