Ok so I bought to long tailed barbs yesterday, males. And one died today. He didn't have any signs of a disease, and he was wedged between a rock and the tank wall when I came home (so he wasn't floating) and it looked like someone had ripped off a good part of his tail fin.
I checked the fish after I took him out, saw no signs of a fungal disease or ick or anything like that. And when I flushed him down the toliet, he floated in the water.
Is it safe to assume that he died from getting stuck between the rock and tank wall and when he was trying to get out, the turtle bit his fin off?
I'm hoping to clean the tank Friday when I have some time from work cause lately when I come home it's late and I don't have time. Let me know if you all think the same. Thanks.

