Can anyone help me I have lost several fish in my tank in the last couple weeks. I find them swimming belly up and they die shortly after that. The last two fish had what appeared to be red spots near the fins and around the body. I have change water several times, test it with test kit and the water is fine. I just recieved 5 baby peacock bass from a friend and want to make sure this doesnt happen to them. One last thing the only fish that survived was my FL gar anyone that has any info please let me know