Hwy Guys and Girls I am looking for a little Guidance advice and hand holding. So both the day before they passed they were active and absolutly fine. Then I noticed them [ 1 first then 4 wks later the other ] looking down at the sand. I have A hotshot crab and thought he was looking for or saw it. Then the next morning I notice fine bubbles on him or her and the next day she Passed. Then the 2nd one the same thing but I quarantined in another tank and again passed the next day after thw.bubbles appeared. What is going on. I have fire fish and anrias in there with no issue and my Coral Area is fine. Also all my snails crabs and Shrimp are fine. I noticed a few Astoria stars but my Harliequin cows them down within a day or so. Also I have been feeding my Garliwquin Chocolate chip starfish pieces is this OK. At least they seem to regenerate ok. Any advice will be greatly accepted. I have 3 tanks a 125 a 75 and a 36. Only the 75 is having fish issues.