coral sick

Our tank has been easy and trouble-free for 5 years... two days ago we lost 2 damsels, a wrasse and a shrimp, next day another shrimp and now our coral looks like this during the day (strings coming off it) and shriveled tonight...not sure what is happening but scared for those left in the tank

Hi, all, I recently started moving into coral in my 6-month old tank and have several small frags of easy corals (zoas, Kenya tree, gsp, mushroom, Duncan, and a small favia I recently acquired). 20 gallon tank with 5 fish and several shrimp, snails, and blue hermits. 480 gph powerhead, Nicrew...

I have a Poletti jawbreaker that I got 6+ months ago. When I got it it was about the size of a nickel. It has shrunk down to like 1/2 of a Mini M&M, its TINY. It still has its color. Its been in a cup out of direct flow for months. I am lost. Any ideas as to why this has happened? And what steps...

This morning I noticed these small white bumps on my coral and I have no idea what it is I’ve had it for around 2 weeks and it always stays open and eats fine. Is something wrong I checked my tank parameters and they where all ok. I have two zoan frags one duncun and one torch all have at least...