Thanks to all of those who gave advice about my sick tiger barb. I tested all of my water and the nitrate and nitrite levels were fine. The ammonia was a little high, but I fixed that with a 50% water change. I have been observing my fish closely and have noticed a few of them scratching themselves on rocks and plants. All of the fish also have small white specks on them too! And all of this started after I put my new tiger barb in the tank. So I've come to the conclusion that my tank has ICH. I went to the store and bought medicine for ich that changes the water blue. I added the medication yesterday and changed the water yesterday before and haven't noticed a difference in my fish at all. I'm really worried and I don't want all of them to die. I'm not sure if I should just empty and scrub out the whole tank, wait and see what happens, or what. Please help and give any advice you can! :cry
I have a 20 gallon tank that includes 2 dalmation mollies, 2 tiger barbs, 1 glass fish, and 1 blue dwarf gourami.