brown spots

My leather toadstool was my first coral back in Feb and has been doing fine until the last two weeks. It started to show signs of a shed but then these brown spots started appearing, the bad started to turn brown and it has not progressed with a shed and has shrunk down. Google has been no help...

i have this brown algae im assuming growing on my tank walls like crazy where im scraping almost every day( it is a month old or so tank) its now more prominant on my rock and a little on my coral, i also found this brown spot on my clown as well, im not sure if this is related. any help would...

Hi, I have a Tang and he's been in my tank for about 2 weeks now. He started getting discolored spots. I have done many google searches and can't seem to find a photo or description that exactly matches. I've seen that it could be ich, an infection or just from stress, so I thought I would just...

I have posted a few pics of my tank on here and I’ve gotten a pretty general consensus - it doesn’t look mature and I don’t seem to have enough algae for my pincushion urchin. So I’ve been leaving the white lights on for most of the day, only the blue at night. More algae started growing but...

I started a saltwater tank over a month ago, and it stayed spotless and clean until I added a colt coral. 2 days after introducing the coral, it started to get smaller and smaller and shrivel. I also see a lot of slime hanging from its tips. My research made me believe this is normal and is part...

Can someone please tell me what is happening or has happened to my mushroom? Is this normal? I fed them reef roids and 15 minutes this happened.

My tank is about 3 weeks old and I had to remove the dry rock yesterday for about 5 hours to remove a pesty damsel. When I placed it back in I noticed these brown spots all over the rock? Any ideas what it is? Thanks!