Over the weekend I picked up 7 cherry barbs and 1 male DG. yesterday I lost my first barb.. Had red streaking in its body, looked like bacterial infection. Lets call him patient zero. Most advanced symptoms. Dosed with melafix last night. today on lunch I scooped out my second barb. Casualty #2. Same red streaking, less evident. When I got home from work 3 hours later the DG was laying on the bottom of the tank not breathing. Dosed with melafix again. Called LFS in a panic, They have a microscope and can test for basically anything. When I scooped out the water to take in, He came up to the surface begging me to help. I started balling my eyes out. They tested my water and found a parasite they have never seen before. Looks like small circles they said. Gave me store credit for the barbs and DG. Sold me Kordon Rid Ich Plus and aquarium salt. By the time I made it home the DG was gone. I can't keep watching fish die. My mental state cannot take it.