coral sick

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...