Hi everyone, I unfortunately don't have a quarantine tank up. I bought three otocinclus catfish and added them to my complete cycled aquarium the other day. Yesterday, I noticed my betta fish has developed malaise and just lays at the bottom. He still does eat, but he would just lay at the bottom. I noticed tonight he has gold dust all over his scales on the side of his body and his head. His fins are also getting ragged. I am pretty sure this is velvet. How do I treat this? I'm attaching photos now. None of the other fish in the aquarium are showing any signs of disease, which leads me to believe that it is only affecting the betta. Update: I have removed the betta and put him in a large glass vase with some bettafix and I have added a dose of malachite green, as well as a pinch of table salt (I have always read that even though table salt has iodine, a small amount won't hurt the fish, as long as you don't use it all the time to treat the tank.) I tried to fine Mardel Coppersafe but the only store open at this hour was a Walmart so I had no choice but to buy malachite green there... Malachite green will kill the velvet once it detaches from the betta, right? Please help! I've never dealt with velvet before!