parasites?

I need help! I have two tanks a 90 gallon and 135 gallon my demise begun after keeping a scopas tang and coral beauty in QT FOR 1 month. I put them in the 135 gallon and next day coral beauty looked rough so i figured he was getting bullied by the scopas tang i kept finding him knipping at him...

I don't know what this is at all. Just looked up a few minutes ago to see my puffer trying to pass whatever this is. It's all stringy and looks almost like something sort of plant, but our tank only has rock. He's acting like normal but his droppings have never looked like this. I'm very worried...

I got this scopas tang about 2 weeks ago and the first few days she got these white spots. They’ll go away and come back as I approach the tank because I notice she is very shy around anyone. Trying to see if it’s ich or velvet. None of my other fish have it, just her. I attached 3 pictures...

I just had a Royal Gramma die after caring for the fish for months with no signs of disease. The fish died within 24 hours after I noticed it acting distressed. After it died, it had what appeared to be the outline of a bite mark on its side, but the bite mark was about five times the size of...

I put my fish in yesterday with some snails and crabs. One fish had normal poo and the other white and stringy. I read that white means parasites. If they both came from the same pet shop and tank wouldn’t they both be infected?

Hi just bought 2 anemones from a local vendor. They were inside a pot. Wanted to remove them in the pot and found these. Looks like a bristle work but don’t know what kind. I did research and it says bristle worms are beneficial to reef aquariums but these look like fire worms isn’t it?? And as...

Anyone ever try to make refugium using sargassum since it’s so readily available on the beach? What should I treat with to avoid the hitchhikers and icky stuff? I was planning on using paraguard by Seachem for a couple of weeks and letting it grow in a tub before introducing it to the system...